Write down the solution for this math problem: Solve 4080 = 729*u - 1001*u for u.
answer: -15

Write down the solution for this math problem: Solve -296*y + 13093 + 21464 = -5746 + 8631 for y.
answer: 107

Write down the solution for this math problem: Solve 123013 = 38*k + 121797 for k.
answer: 32

Write down the solution for this math problem: Solve 195*s - 202*s = 21 for s.
answer:
-3