Answer:
m = 3
Step-by-step explanation:
Simplifying
3m + 3 = 15 + -1m
Reorder the terms:
3 + 3m = 15 + -1m
Solving
3 + 3m = 15 + -1m
Solving for variable 'm'.
Move all terms containing m to the left, all other terms to the right.
Add 'm' to each side of the equation.
3 + 3m + m = 15 + -1m + m
Combine like terms: 3m + m = 4m
3 + 4m = 15 + -1m + m
Combine like terms: -1m + m = 0
3 + 4m = 15 + 0
3 + 4m = 15
Add '-3' to each side of the equation.
3 + -3 + 4m = 15 + -3
Combine like terms: 3 + -3 = 0
0 + 4m = 15 + -3
4m = 15 + -3
Combine like terms: 15 + -3 = 12
4m = 12
Divide each side by '4'.
m = 3
Simplifying
m = 3