Question

What is the inverse of the function g(x) = -3(x+6)?

Answer 1

g-1(x) = -x/3 - 6.

Explanation:

Let g(x) = y = -3(x + 6)

y = -3x - 18

3x = - y - 18

x = -y/3 - 6

Now replace x by the inverse g-1(x) and y by x, so

g-1(x) = -x/3 - 6.