Question

Given the function f(x) = 2(x + 8), find x if f(x) = 12

2
40
−2
14

Answer 1

2x + 16 = 12
find x......

Answer 2

set your function equal to 12 and then solve for x:
\[2(x+8) =12\]
in order to get rid of the parentheses distribute the 2 to the x and 8
\[2x+16=12\]
and solve for x.

Answer 3

-2

Answer 4

yup that's correct, you can check by just plugging in that value into your original function and seeing if it comes out to what you expect it to (12).
\[f(-2) = 2(-2+8)\] \[f(-2) = 2(6)=12\]