question: Teacher asked me this: Solve 304*i = 311*i - 70 for i.
++++++++++
answer: 10

question: Teacher asked me this: Solve -10*k + 37 - 128 = 59 for k.
++++++++++
answer: -15

question: Teacher asked me this: Solve 116 - 66 = 10*y for y.
++++++++++
answer: 5

question: Teacher asked me this: Solve -20*b - 279 = -399 for b.
++++++++++
answer:
6