question: Teacher asked me this: Solve -72*y + 1279 = -83*y + 1444 for y.
++++++++++
answer: 15

question: Teacher asked me this: Solve -33*s - 1 = -22*s - 23 for s.
++++++++++
answer: 2

question: Teacher asked me this: Solve 138 = 395*k - 533*k for k.
++++++++++
answer: -1

question: Teacher asked me this: Solve 5498*r = 5400*r + 2744 for r.
++++++++++
answer:
28