Question

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

2

40

−2

14

Answer 1

40?

Answer 2

yap

Answer 3

simply put x=12 into the equation
2(12+8)
2 x 20 = 40

Answer 4

It is if f(x) = 12, not x = 12.

So, you would substitute in f(x) = 12 and solve for x.

Answer 5

40 would not be correct.

Answer 6

2(x+8) = 12
=> x+8 = 6
=> x = -2