Question

If f(x)=-12x−3, find x for f(x)=89.

Answer 1

89 = -12x - 3
89 + 3 = -12x
92 = -12x
-92/12 = x
-23/3 or -7 2/3 = x

Answer 2

F(89)=-12(89)-3=-1068-3=-1071