question: Teacher asked me this: Solve 20*n - 21 = 17*n for n.
++++++++++
answer: 7

question: Teacher asked me this: Solve -11*v + 550 = 770 for v.
++++++++++
answer: -20

question: Teacher asked me this: Solve -572 - 4 = -32*z for z.
++++++++++
answer: 18

question: Teacher asked me this: Solve 189018 = 5082*o - 376*o + 5795*o for o.
++++++++++
answer:
18