Question

Solve the following equations for x. Show your work:

1. 9x - 12 = 8x + 16
2. 36 - 18r = 4 (3 + r)
3. 4 (4p +3) = 8p + 16
4. 15a + 60 = 12a -84

Answer 1

I think it may be 1 I could be wrong

Answer 2

1. x=28

2. r=1+1/11

3=p=1/2

4=a=-48

Explanation:

1.

9x-12=8x+16

We move all terms to the left:

9x-12-(8x+16)=0

We get rid of parentheses

9x-8x-16-12=0

We add all the numbers together, and all the variables

x-28=0

We move all terms containing x to the left, all other terms to the right

x=28