Question

Solve -9r + 12 = -24

Answer 1

Answer: r=4

What you do is subtract 12 from itself and from -24 then you have -9r=-36. Then you take -9r and divide it -9 then do the same to -36 and you get 4 :)

Answer 2

-9r+12=-24
-12. -12
__________
-9r=-24-12
-9r=-36
——. ——
-9r -9r

r=-4