Question

How do you solve `-9x-12=177`?

Answer 1

Add 12 to both sides
then divide by `(-9)`
to get `x=-21`

Explanation:

Given
`color(white)("XXXX")` `-9x-12=177`
Add `12` to both sides
`color(white)("XXXX")` `-9x = 189`
Divide both sides by `(-9)`
`color(white)("XXXX")` `x = -21`