Question 792038
3(m - 5) + 6m = -87
3m - 15 + 6m = -87
9m - 15 + 15 = -87 + 15
9m = -72
9m/9 = -72/9
m = -8

check:
3(-8 - 5) + 6(-8) = -87
3(-13) + -48 m= -87
-39 + -48 = -87
-87 = -87