Question

The solution shown for the equation is incorrect. What is the correct​ solution? What is the​ error?

-5 (4 - r) = 15
-20 - 5r =15
-5r = 35
r = -7

Answer 1

r = 7 not -7
-5(4 - r) = 15
-5(4 - r)/-5 = 15/-5
4 - r = -3
4 - r - 4 = -3 - 4
-r = -7
-r/-1 = -7/-1
r = 7