Question

solve $y = f(x)$ for $x$. then find the input(s) when the output is 2 .
$f(x)=x-2$
$x = \square$
the input is $\square$ when the output is 2 .

Explanation:

Step1: Set $y=f(x)$, solve for $x$

Let $y = x - 2$. Add 2 to both sides:
$x = y + 2$

Step2: Substitute output $y=2$

Substitute $y=2$ into $x = y + 2$:
$x = 2 + 2$

Answer:

$x = y + 2$
The input is $4$ when the output is 2.