Question: What is the solution?

Solve 1038*f - 49 = 1031*f for f.

Answer: 7

Question: What is the solution?

Solve 1050*m = 1067*m - 272 for m.

Answer: 16

Question: What is the solution?

Solve 0 = 20*r - 39*r + 23*r + 40 for r.

Answer: -10

Question: What is the solution?

Solve -5*z + 8 = -12 for z.

Answer:
4