question: Teacher asked me this: Solve 61 = 4*t + 69 for t.
++++++++++
answer: -2

question: Teacher asked me this: Solve 0 = -27*f + 20*f + 7 for f.
++++++++++
answer: 1

question: Teacher asked me this: Solve 3*u + 2 = 2 for u.
++++++++++
answer: 0

question: Teacher asked me this: Solve 34*b = 253*b - 4380 for b.
++++++++++
answer:
20