question: Teacher asked me this: Solve 21*t + 103 = -302 + 27 for t.
++++++++++
answer: -18

question: Teacher asked me this: Solve -12*z + 147*z = -100*z - 2439 - 4611 for z.
++++++++++
answer: -30

question: Teacher asked me this: Solve -24*f + 479 = 10*f + 411 for f.
++++++++++
answer: 2

question: Teacher asked me this: Solve 118*s + 787 = -747 for s.
++++++++++
answer:
-13