question: Teacher asked me this: Solve -21 = 22*o - 153 for o.
++++++++++
answer: 6

question: Teacher asked me this: Solve -7241*r - 31327 + 287463 = -76950 for r.
++++++++++
answer: 46

question: Teacher asked me this: Solve -85*k + 2750 + 2318 = -266*k for k.
++++++++++
answer: -28

question: Teacher asked me this: Solve 780 - 114 = -60*g - 474 for g.
++++++++++
answer:
-19