question: Teacher asked me this: Solve 31*s + 18*s + 7*s = -34*s + 630 for s.
++++++++++
answer: 7

question: Teacher asked me this: Solve 2*d - 17 + 15 = 0 for d.
++++++++++
answer: 1

question: Teacher asked me this: Solve -10*h - 13 = 7 for h.
++++++++++
answer: -2

question: Teacher asked me this: Solve 38*q = 67*q - 34*q - 45 for q.
++++++++++
answer:
-9