Question

How do you solve the equation: `x + 13 = -8`?

Answer 1

Subtract `13` from both sides to isolate `x`
`color(white)("XXXX")` `x = -21`

Explanation:

If `x+13 = -8`
then
`color(white)("XXXX")` `(x+13) - 13 = (-8) -13`

`color(white)("XXXX")` `x+(13-13) = -(8+13)`

`color(white)("XXXX")` `x = -21`