question: Teacher asked me this: Solve -289 = 21*a - 310 for a.
++++++++++
answer: 1

question: Teacher asked me this: Solve -884*f + 878*f - 2070*f + 437580 = 3534*f for f.
++++++++++
answer: 78

question: Teacher asked me this: Solve -25 = 747*z - 742*z for z.
++++++++++
answer: -5

question: Teacher asked me this: Solve 6030*x - 6039*x - 171 = 0 for x.
++++++++++
answer:
-19