question: Teacher asked me this: Solve -150*d + 126 = -164*d for d.
++++++++++
answer: -9

question: Teacher asked me this: Solve 22*o + 6 = 24*o for o.
++++++++++
answer: 3

question: Teacher asked me this: Solve 5*o = -0 + 25 for o.
++++++++++
answer: 5

question: Teacher asked me this: Solve 0 = -77*v + 197*v - 1560 for v.
++++++++++
answer:
13