Write down the solution for this math problem: Solve -15*m + 10 + 65 = 0 for m.
answer: 5

Write down the solution for this math problem: Solve -4*f + 55 = 59 for f.
answer: -1

Write down the solution for this math problem: Solve 0 = 421*a - 533*a + 1008 for a.
answer: 9

Write down the solution for this math problem: Solve -4 = -0*q + 4*q for q.
answer:
-1