question: Teacher asked me this: Solve 0 = -2*t + 4*t for t.
++++++++++
answer: 0

question: Teacher asked me this: Solve 381*c - 67*c = -1691 - 8043 for c.
++++++++++
answer: -31

question: Teacher asked me this: Solve -1782*b = -1784*b + 20 for b.
++++++++++
answer: 10

question: Teacher asked me this: Solve 20138975 - 20141575 = -50*y for y.
++++++++++
answer:
52