Question

8+3m= -7
3m= -7-8
3m= -15
How to verify this answer

Answer 1

Explanation:

8+3m=-7

3m= -7-8

3m=-15

m= -5

Answer 2

see below

Explanation:

8+3m= -7

Subtract 8 from each side

3m+8-8= -7-8

Combine like terms

3m= -15

Divide each side by 3

3m/3 = -15/3

m = -5

Check

8+3m= -7

8+3(-5) = -7

8-15 = -7

-7 = -7

m = -5 is the solution