question: Teacher asked me this: Solve 0*x - 4*x = -9*x for x.
++++++++++
answer: 0

question: Teacher asked me this: Solve -68*b - 105*b + 3071 = 11*b - 1529 for b.
++++++++++
answer: 25

question: Teacher asked me this: Solve 53*q + 2175954 = 2174311 for q.
++++++++++
answer: -31

question: Teacher asked me this: Solve 537*m = 542*m - 20 for m.
++++++++++
answer:
4