Write down the solution for this math problem: Solve 99867*u = 99716*u - 2501 - 3690 for u.
answer: -41

Write down the solution for this math problem: Solve 64*r - 61 - 3 = 0 for r.
answer: 1

Write down the solution for this math problem: Solve -426*r = 140 + 712 for r.
answer: -2

Write down the solution for this math problem: Solve 7*m + 9*m = 96 for m.
answer:
6