question: Teacher asked me this: Solve 6*c - 21*c - 60 = 0 for c.
++++++++++
answer: -4

question: Teacher asked me this: Solve 6 = 11*p + 39 for p.
++++++++++
answer: -3

question: Teacher asked me this: Solve 3*y + 4*y = 49 for y.
++++++++++
answer: 7

question: Teacher asked me this: Solve 99*b - 105*b + 24 = 0 for b.
++++++++++
answer:
4