Question

Given ƒ(x) = −12x + 72, find x when ƒ(x) = 24. A) 1 B) 3 C) 4 D) 6



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Answer 1

Answer:

if f(x)=24

24=-12x+72

24-72=-12x

-48=-12x

x=48/12

x=4

so it's (C)

Answer 2

Answer:

x=4; Option C is your answer.

Step-by-step explanation:

Plug in 24:

$f(x)=24$

$24=-12x+72$

Solve For X:

$-12x+72-72=24-72\\-12x=-48\\\frac{-12x}{-12} =\frac{-48}{-12}\\ x=4$