question: Teacher asked me this: Solve -3*w - 36 = 10*w - 31*w for w.
++++++++++
answer: 2

question: Teacher asked me this: Solve 21 = 11*d - 12 for d.
++++++++++
answer: 3

question: Teacher asked me this: Solve 1612*h + 1183 = 1853*h - 504 for h.
++++++++++
answer: 7

question: Teacher asked me this: Solve -139 = -41*o + 25 + 369 for o.
++++++++++
answer:
13