question: Teacher asked me this: Solve -5*r - 56 = -33*r for r.
++++++++++
answer: 2

question: Teacher asked me this: Solve -81*r - 28 = 77*r - 165*r for r.
++++++++++
answer: 4

question: Teacher asked me this: Solve -13*j - 175 - 219 = -147 for j.
++++++++++
answer: -19

question: Teacher asked me this: Solve 6988*w = 6997*w for w.
++++++++++
answer:
0