Write down the solution for this math problem: Solve 4283*o = 4130*o - 306 for o.
answer: -2

Write down the solution for this math problem: Solve 447855 = -18913*u - 327578 for u.
answer: -41

Write down the solution for this math problem: Solve 7*p = 13*p + 19*p - 775 for p.
answer: 31

Write down the solution for this math problem: Solve 307*r = -69*r + 595 + 533 for r.
answer:
3