Question

Given f (x) = -12x + 72, find x when f(x) = 24.

Answer 1

x = 4

Given:

f(x) = -12x + 72

f(x) = 24

Explanation:

`= > - 12x + 72 = 24 \\ \\ = > - 12x = 24 - 72 \\ \\ = > \cancel{- }12x = \cancel{-} 48 \\ \\ = > 12x = 48 \\ \\ = > x = (48)/(12) \\ \\ = > x = 4`