Mathematics High School

Solve for x. Show your work: x + 3 = 12

Answers

Answer 1

Answer:

x=9

Step-by-step explanation:

The objective is to get x by itself, so to do that we need to subtract three from both sides:

x + 3 = 12

      -3    -3

12-3= 9.

So, x=9.

Hope this helped!

Answer 2

Answer: x=9

x+3=12

1x+3=12

      -3

   =9

1x =9    --->  1x/1   9/1

/1   /1    --->  1x/1   9/1

x=9

Step-by-step explanation:

sorry if this doesn't make sense

Related Questions

Enter the number in standard notation.
5.39 x 105=?

Answers

Answer:

539,000

Step-by-step explanation:

539,000 is 5.39x10^5

Which describes the slope of the given line?

Answers

Answer:

Negative

Step-by-step explanation:

I hope this is right!

Negative is that answer negative is a line that travels downward from left to right.

7 plus twice a number.

Answers

Answer: 7 +2x

Step-by-step explanation:

7 plus twice a number

Twice a number - 2x

7 plus 2x

V I’m please help I already posted this but I did this answer

Answers

Answer: m+1

Step-by-step explanation:

Find the slope of the line through each pair of points.

(1,19) , (1,-7)

Answers

Answer:

undefined (that's the actual answer)

Step-by-step explanation:

5 ( 3x - 2) = 4 ( 2x + 1)

Answers

Answer:

15x-2=8x+1

13x=9x

i think that's correct im not sure but i hope to help u :)

5(3x-2)=4(2x+1)
(15x-10)=(8x+4)
7x-10=4
7x=14
X=2
Explanation:
I multiplied everything inside the parenthesis by the number on the outside, making the equation 15x-10=8x+4, then I combined like terms, so I subtracted 8x on both sides and added 10 to each side, making the equation 7x=14, this means that 14/7 and 7/7 is the last step, which leaves you with the answer of x=2

What is the x-intercept ?

Answers

Answer:

-3

Step-by-step explanation:

Which of the following groups of numbers are integers?
A-4, 8, -54, 29
B-22,1/2,0,88

C 25, 89, 16, -5

g. 3/8 22, 19,0

Answers

A and C are the correct answers
a - 4,8,-54,29
b- 22,1/2,0,88

guys help ME OUT
Compare the rental car costs, C(200) and T(200). Which car company, Speedy or Tom's Car Rentals, offers a better price for a one day rental, given that the car will be driven exactly 200 miles?

Answers

what is the central dogma of biology

Answer:

Tom's Car Rentals

Step-by-step explanation:

S: 0.10(200) + 41 = 61

T: 0.25(200) = 50

It is evident that Tom's Car Rentals holds the better deal.

This is what I said on my homework:)

Help me for a brainllest. A theater holds 2,680 seats. The lower level has 100 less than 2 times as many seats as the upper level. The middle level has 80 more than 3 times as many seats as the upper level. How many seats are in the middle level?

Answers

Answer: 1430

Step-by-step explanation: x + y + z = 2680  

x = 2z - 100  

y = 3z + 80  

x + y = 5z - 20  

6z - 20 = 2680  

z = 450  

y = 1430  

Solution:  

x = 800, y = 1430, z = 450

Answer:

1430

Step-by-step explanation:

i would keep this up but i figured it out and now i understand

Answers

Answer: Ok then i'm happy for you!

Step-by-step explanation:

Can someone help me with this

Answers

Gamma mart because it has the lowest price
I think the answer is Beta Mart

Is this figure a triangle?

Side A:3 cm

Side B: 4 cm

Side C: 5 cm

explain the terms of length on the side

Answers

Step-by-step explanation:

Not because that not same number

In a group of 34 students, 11 study both Art and Biology.
15 study Biology but not Art.
4 study neither subject.
Given that a randomly selected student studies Art, what is the probability the student studies Art and Biology?

Answers

Answer:

32.35% is the answer

Step-by-step explanation:

^^^

Ayuda con esto tengo muchos deberes y nececito terminarlos ahora, por favor ayuda :( .María y Nancy son vecinas, y todas estas semanas han realizado compras en el mercado. La semana pasada María gastó 25,75 dólares, exactamente 3 veces más de lo que gastó Nancy, que tenía poco que comprar. ¿Cuánto dinero se gastó Nancy?

Answers

Answer:

Nancy gastó 8,58 dólares.

Step-by-step explanation:

Para calcular cuánto dinero gastó Nancy, debemos hallar la relación entre Nancy y María, tal como sigue:

[tex] M = 3N [/tex]    (1)

En donde M es por María y N por Nancy

En la relación de la equación (1) tenemos que el dinero que gastó María es 3 veces lo que gastó Nancy, tal como dice el enunciado.

Entonces, podemos hallar ahora cuánto gastó Nancy:

[tex] N = \frac{M}{3} = \frac{25,75}{3} = 8,58 [/tex]

Por lo tanto, Nancy gastó 8,58 dólares.  

Espero que te sea de utilidad!

Xavier is driving home. He starts 250 miles from home and his car can travel 28 miles per gallon of gasoline he uses. Xavier stops at a rest stop that is 100 miles from home. Let g be the amount or gas he has used at that point. Set up and solve an equation for how much gas Xavier used to get to the rest stop.

Answers

Answer:

For 100 miles he uses 3.571 gallons of gasoline.

In equation form it is y/x*100

Step-by-step explanation:

Unitary Method

He travels 28 miles per gallon of gasoline.

For 1 mile he uses  1/28 gallons

For 100 miles he uses 1/28 * 100= 100/28= 3.571 gallons of gasoline.

Let x be the miles and y be the gallons of gasoline used to travel x miles.

Then for 1 mile  the gallons of gasoline used will be y/ x gallons.

For 100 miles  the gallons of gasoline used will be y/x *100 gallons.

In equation form it is y/x*100 gallons for 100 miles where x is the number of miles and y is the amount of gallons.

I=prt solveing for t​

Answers

Answer:

t= i/pr

Hope this helps!!!!!!!!

Can you please help solve this problem Find m

Answers

Answer:

where is your question boy /girl tell me

A company orders 24 boxed lunches from a deli for $238.80. If each boxed lunch costs the same amount, what is the unit cost of each boxed lunch?

Answers

Answer:

$9.95

Step-by-step explanation:

$238.80 ÷ 24 = $9.95

$238.80 ⇾ The final cost of boxed lunches altogether.

24 ⇾ The number of boxed lunches bought.

$9.95 ⇾ The unit price of boxed lunches after dividing the final cost($238.80) by the amount bought(24).  

Hope this wasn't confusing. o(^▽^)o

✨Hope this helps✨

3x + 5 = 6x – 13
please please help!

Answers

Answer:

Simplifying

3x + -5 = 6x + -13

Reorder the terms:

-5 + 3x = 6x + -13

Reorder the terms:

-5 + 3x = -13 + 6x

Solving

-5 + 3x = -13 + 6x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-6x' to each side of the equation.

-5 + 3x + -6x = -13 + 6x + -6x

Combine like terms: 3x + -6x = -3x

-5 + -3x = -13 + 6x + -6x

Combine like terms: 6x + -6x = 0

-5 + -3x = -13 + 0

-5 + -3x = -13

Add '5' to each side of the equation.

-5 + 5 + -3x = -13 + 5

Combine like terms: -5 + 5 = 0

0 + -3x = -13 + 5

-3x = -13 + 5

Combine like terms: -13 + 5 = -8

-3x = -8

Divide each side by '-3'.

x = 2.666666667

Simplifying

x = 2.666666667

Step-by-step explanation:

Answer:

x = 6

Step-by-step explanation:

help I forgot how to do these questions
​

Answers

A x > 10 is the answer

Write the phrase as an expression. Then simplify the expression.
7 plus the sum of a number 2 and 5
expression for the phrase:
simplified expression:

Answers

Answer:

7+2+5

7+7

7+7=14

-----------

Helppppppppp i will mark you as a Brianlist

Answers

Answer:

I would say 23

Step-by-step explanation:

From 13 to 17 they add 4 then from 17 to 21 they add 4 so 21 plus 4 does not equal 23

Answer:

16, 25, 36

Step-by-step explanation:

there's a lot lol

Can anyone answer this by sending a photo with 20-30 different numbers in a set so that I can do a project by making a class chart? This is in my Prob/Stats Class. All I need is the set of numbers; the rest I can do. Thank you!
This is for 30 points.

Answers

Answer:

i figured out how to attach lol

Step-by-step explanation:

I need help!!! Can you put this in order for me !

Answers

Answer:
7=2x+4
3=2x
X=3/2

Select all that are equivalent to: (-12x-8)/4
3x-2

​
1/4 (12x+8)​

-(12x+8)/-4
-3x-2−3x−2

-3x+2−3x+2

Answers

All that are equivalent to (-12x-8)/4 is:
•A
•B
•C

You are 5 1/4 feet tall. You must be at least 5 3/4 feet tall to ride a roller coaster. Which inequality represents how much taller you must be to ride the roller coaster?​

Answers

Answer:

Not quite understanding but it could possibly be 5 1/4<5 3/4.

5 1/4 + 1/2= 5 3/4= 5 3/4

Step-by-step explanation:

2p + 3 = 5 - 6p
what is the value of p in the equation?

Answers

Answer:

p=1/4

Step-by-step explanation:

original: 2p+3=5-6p

move variable to one side: 2p+6p=5-3

combine like terms: 8p=2

answer :p=2/8

simplify answer (final answer): p=1/4

2p+3=5-6p

2p+6p+3=5

2p+6p=5-3

8p=5-3

8p=2

Answer: p=1/4

What represents 60=5 x 12?

Answers

Answer:

multiplication

Step-by-step explanation:

Select the location on the number line to plot the point -2 1/2 and 6 1/2. I just need the answer ​

Answers

Answer:

move one line from the negative 3 for -2 1/2 and one to the left from 7 for 6 1/2

Step-by-step explanation:

Answer: The answer provided is correct

Step-by-step explanation:

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