Question

Help! Please answer! :(

Given the function f(x) = 2(x + 6), find x if f(x) = 22.
A) 56
B) 5
C) 38
D) 17

Thank you!

Answer 1

Just took the test and the answer is b :)

Answer 2

f(x) = 2(x+6). If f(x) = 22, that means replace f(x) with 22
22 = 2(x+6) or
22 = 2x + 12 . Now solve this equation with the variable x:

2x = 22 - 12

2x = 10

x = 5 (Answer B)