Question

Given the function f(x) = -5x + 1 + 3, for what values of x is f(x) = -12?

Answer 1

Answer:x= -2x, x=4

Explanation:

Answer 2

`x=(16)/(5)`

Explanation:

The given function is

`f(x) = -5x +1+3`

Which can be rewritten also as

`f(x) = -5x +4`

We want to find the values of x for which

`f(x) = -12`

In order to do that, we just substitute -12 into f(x), and we solve the equation for x:

`-12 = -5x + 4\\-16 = -5x\\x=(-16)/(-5)=(16)/(5)`