question: Teacher asked me this: Solve 13 = 29*i - 118 + 15 for i.
++++++++++
answer: 4

question: Teacher asked me this: Solve 0 = 12*f - 46 + 118 for f.
++++++++++
answer: -6

question: Teacher asked me this: Solve 0 = 164*k + 210*k - 2120 - 872 for k.
++++++++++
answer: 8

question: Teacher asked me this: Solve -197 = 13*y - 26*y - 41 for y.
++++++++++
answer:
12