question: Teacher asked me this: Solve 12*b = 8 + 40 for b.
++++++++++
answer: 4

question: Teacher asked me this: Solve 0 = -30*x + 21*x - 45 for x.
++++++++++
answer: -5

question: Teacher asked me this: Solve 17*m = 8*m + 54 for m.
++++++++++
answer: 6

question: Teacher asked me this: Solve 0 = 7*a - 46 + 11 for a.
++++++++++
answer:
5