Question

How do you solve `12r+34=-6r-(-9)`?

Answer 1

`r = - 25/ 18`

Explanation:

`12r + 34 = - 6r - (- 9)`

add `6r` to both sides
`12r + 34 + 6r = - 6r + 9+ 6r`
`18r + 34 = 9`

minus `34` to both sides
`18r + 34 - 34 = 9 - 34`
`18r = - 25`

divide by `18` to both sides
`(18r)/18 = - 25/ 18`
`r = - 25/ 18`