Question

How do you solve and graph `13>18+r`?

Answer 1

`13 > 18 + r`

Subtract `color(blue)18` from both sides of the inequality:
`13 quadcolor(blue)(-quad18) > 18 + r quadcolor(blue)(-quad18)`

`-5 > r`

`r < -5`

This can be said as "`r` is less than `-5`."

Here's a graph of it:

mathwarehouse.com