question: Teacher asked me this: Solve -31 - 105 = 34*m for m.
++++++++++
answer: -4

question: Teacher asked me this: Solve 37*z - 21 = 53 for z.
++++++++++
answer: 2

question: Teacher asked me this: Solve 421*m + 3407 = -483*m - 379*m - 20970 for m.
++++++++++
answer: -19

question: Teacher asked me this: Solve -18 = -64*n + 141*n - 1173 for n.
++++++++++
answer:
15