Question

F(x)=-2x+4
what is x when f(x)=-8

Answer 1

20

Explanation:

f(x) = -2 (x) + 4 (substitute x for the given value)

f(x) = -2 (-8) + 4 (multiply -2 and -8)

f(x) = 16 +4 (add 16 and 4)

f = 20

Answer 2

f(-8)=-2(-8)+4
f(-8)=16+4
f(-8)=20