Question

15=4a+5+2
How do I solve this?

Answer 1

a=+5

Explanation:

We move all terms to the left:

15-(4a-a)=0

We add all the numbers together, and all the variables

-(+3a)+15=0

We get rid of parentheses

-3a+15=0

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

-3a=-15

a=-15/-3

a=+5

Answer 2

a=2

Explanation:

15=4a+5+2

Combine like terms

15 = 4a+7

Subtract 7 from each side

15 -7 = 4a+7-7

8 = 4a

Divide each side by 4

8/4 =4a/4

2 =a