Question

Sole for r −13= r/9 +8

Answer 1

-189

Explanation:

Khan academy

Answer 2

-189

Explanation:

Isolate the r/9 (so subtract the 8 and add it to the other side). Then multiply the 9 out and you should get -189

Work:

-13=r/9 +8

-21=r/9

-189=r