Question

How to solve equations

Answer 1

-2m+15=45
-2m=45-15
-2m=30
2m=-30
m=-15

Answer 2

-2m + 15 = 45 (original problem)
-2m = 30          (remove 15 from both sides)
-2m/-2 = 30/-2 (divide by -2)
m = -15