question: Teacher asked me this: Solve -134*r + 140*r + 7 - 43 = 0 for r.
++++++++++
answer: 6

question: Teacher asked me this: Solve 0 = -122*s + 80*s - 168 for s.
++++++++++
answer: -4

question: Teacher asked me this: Solve -563*z - 508*z + 659 - 7319 - 837 = 0 for z.
++++++++++
answer: -7

question: Teacher asked me this: Solve 0 = 24*z - 136*z - 224 for z.
++++++++++
answer:
-2