Question: What is the solution?

Solve -791*o - 22860 + 712 = 0 for o.

Answer: -28

Question: What is the solution?

Solve 0*k + 75 - 201 = -9*k for k.

Answer: 14

Question: What is the solution?

Solve -39287 + 4931 = 1551*s - 1052*s - 1921 for s.

Answer: -65

Question: What is the solution?

Solve -a + 2*a = 0 for a.

Answer:
0