Question: What is the solution?

Solve -533*m + 267 + 579 = -110*m for m.

Answer: 2

Question: What is the solution?

Solve 57 = -20*a + 17 for a.

Answer: -2

Question: What is the solution?

Solve 235*k = -4275 + 1220 for k.

Answer: -13

Question: What is the solution?

Solve 0 = -105*x + 139*x + 2974 - 255 - 271 for x.

Answer:
-72