question: Teacher asked me this: Solve 178 = -18*a + 70 for a.
++++++++++
answer: -6

question: Teacher asked me this: Solve -2*b + 20 = 2*b for b.
++++++++++
answer: 5

question: Teacher asked me this: Solve -7 = 11*u + 4 for u.
++++++++++
answer: -1

question: Teacher asked me this: Solve 37*m + 213 - 472 = 0 for m.
++++++++++
answer:
7