Question

Given f(x) = -x - 8 and f(x) = -10, find x. (What was the input?)

Answer 1

`{ \qquad\qquad\huge\underline{{\sf Answer}}}`

Here, we need to find the input that will result in f(x) = -10

So, let's equate those two ~

`\qquad \sf  \dashrightarrow \: - x - 8 = - 10`

`\qquad \sf  \dashrightarrow \: - x = - 10 + 8`

`\qquad \sf  \dashrightarrow \: - x = - 2`

`\qquad \sf  \dashrightarrow \: x = 2`

So, the input as x = 2 to get the given results.