Question: What is the solution?

Solve 67856*z = 67876*z - 440 for z.

Answer: 22

Question: What is the solution?

Solve -263*u - 186 = 340 for u.

Answer: -2

Question: What is the solution?

Solve 0 = -97*m - 69703 + 62913 for m.

Answer: -70

Question: What is the solution?

Solve 0 = 27*f - 2001 + 1839 for f.

Answer:
6