question: Teacher asked me this: Solve -42 = 87*d - 17*d - 392 for d.
++++++++++
answer: 5

question: Teacher asked me this: Solve -44*s - 64 = 29 - 357 for s.
++++++++++
answer: 6

question: Teacher asked me this: Solve -100 + 137 + 299 = 24*o for o.
++++++++++
answer: 14

question: Teacher asked me this: Solve -159 + 111 = -12*v for v.
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answer:
4