question: Teacher asked me this: Solve -5*m + 13 = -7 for m.
++++++++++
answer: 4

question: Teacher asked me this: Solve -j = -5*j for j.
++++++++++
answer: 0

question: Teacher asked me this: Solve 0 = 5*c + 7 + 18 for c.
++++++++++
answer: -5

question: Teacher asked me this: Solve -472*i = -4172 - 4324 for i.
++++++++++
answer:
18