Write down the solution for this math problem: Solve 25*c - 15*c - 40 = 0 for c.
answer: 4

Write down the solution for this math problem: Solve 87160*x - 12333 = 87294*x - 2283 for x.
answer: -75

Write down the solution for this math problem: Solve 0 = -60*m + 51*m + 36 for m.
answer: 4

Write down the solution for this math problem: Solve -6741*o = -2406*o + 6671*o - 231126 for o.
answer:
21