Write down the solution for this math problem: Solve 971*u - 17311 = 21529 for u.
answer: 40

Write down the solution for this math problem: Solve 0 = -90*k + 56 + 124 for k.
answer: 2

Write down the solution for this math problem: Solve 16*m - 807 = 85*m + 366 for m.
answer: -17

Write down the solution for this math problem: Solve -247 = 10*m - 197 for m.
answer:
-5