Write down the solution for this math problem: Solve 643*b - 591*b - 3276 = 0 for b.
answer: 63

Write down the solution for this math problem: Solve 219*i - 208*i - 22 = 0 for i.
answer: 2

Write down the solution for this math problem: Solve 34 = 3*u + 43 for u.
answer: -3

Write down the solution for this math problem: Solve 0 = -61*c + 61 for c.
answer:
1