Write down the solution for this math problem: Solve 159*r - 165*r = -42 for r.
answer: 7

Write down the solution for this math problem: Solve -1522 + 1346 = 8*q for q.
answer: -22

Write down the solution for this math problem: Solve 9*m + 4452 - 4425 = 0 for m.
answer: -3

Write down the solution for this math problem: Solve -82*u + 128*u - 118 = 112 for u.
answer:
5