Question

Given the function f(x) = −2x + 8, find x if f(x) = 22.

−36

−7

52

−15

Answer 1

f(x) = −2x + 8


22 = −2x + 8


22-8 = −2x


14 = −2x


14/(-2) = x


-7 = x


x = -7