question: Teacher asked me this: Solve 0 = 19*r - 14*r - 40 for r.
++++++++++
answer: 8

question: Teacher asked me this: Solve 0 = -557*h - 177*h - 180*h + 60324 for h.
++++++++++
answer: 66

question: Teacher asked me this: Solve -45*q + 202 - 1597 = 0 for q.
++++++++++
answer: -31

question: Teacher asked me this: Solve 309*k - 140 - 159 = 322*k for k.
++++++++++
answer:
-23