Write down the solution for this math problem: Solve -556*z + 50400 = 344*z for z.
answer: 56

Write down the solution for this math problem: Solve -923*k + 965*k - 546 = 0 for k.
answer: 13

Write down the solution for this math problem: Solve 1735*c - 12 = 1729*c for c.
answer: 2

Write down the solution for this math problem: Solve 7*c + 112*c = -77*c + 5880 for c.
answer:
30