question: Teacher asked me this: Solve 386*z - 15642 = 31*z - 63*z - 56*z for z.
++++++++++
answer: 33

question: Teacher asked me this: Solve -3*l - 2 = -8 for l.
++++++++++
answer: 2

question: Teacher asked me this: Solve 480*m + 646*m = 150*m - 2928 for m.
++++++++++
answer: -3

question: Teacher asked me this: Solve -21346*q = -21408*q - 1302 for q.
++++++++++
answer:
-21