question: Teacher asked me this: Solve -37 = 6*a - 61 for a.
++++++++++
answer: 4

question: Teacher asked me this: Solve -177*r + 151 + 663 = 181*r - 336*r for r.
++++++++++
answer: 37

question: Teacher asked me this: Solve 6288 = 40132*k - 40525*k for k.
++++++++++
answer: -16

question: Teacher asked me this: Solve 38*y + 7071 = 7299 for y.
++++++++++
answer:
6