Question

Given f(x) = -x - 2, find x when f(x) = 12.

Answer 1

14

Explanation:

y = 12

12 = x - 2

14 =x

Answer 2

Explanation:

f(x) = -x-2

in finding x we need to implies that we already know f(x) = 12

therefore:

f(x) = -12 - 2

we need to know this laws that - × - is = +

this give us to the final answer:

12 + 2 = 14