Write down the solution for this math problem: Solve 5655*u - 11473*u = -5710*u - 6048 for u.
answer: 56

Write down the solution for this math problem: Solve 5*r + 78 = 68 for r.
answer: -2

Write down the solution for this math problem: Solve 83*z - 18 = 77*z for z.
answer: 3

Write down the solution for this math problem: Solve -2622*a + 4825*a - 2460*a + 7453 = 0 for a.
answer:
29