Question

-13 =
`(r)/(9)` +8

what is r?

Answer 1

`- 13= (r)/(9) + 8 \\ (r)/(9) = - 13 - 8 \\ (r)/(9) = - 21 \\ r = 9 * - 21 \\ r = - 189`

I hope I helped you^_^