Write down the solution for this math problem: Solve -646*a + 31008 = 764*a - 866*a for a.
answer: 57

Write down the solution for this math problem: Solve 19 = -7*c + 26*c for c.
answer: 1

Write down the solution for this math problem: Solve -125 = 5*f - 170 for f.
answer: 9

Write down the solution for this math problem: Solve 0 = 89*q - 299*q - 1154*q + 13640 for q.
answer:
10