Question: What is the solution?

Solve -w - 5 = -2*w for w.

Answer: 5

Question: What is the solution?

Solve 0 = 8*a - 5 + 13 for a.

Answer: -1

Question: What is the solution?

Solve 734*o + 1548 = -40*o for o.

Answer: -2

Question: What is the solution?

Solve -20*m - 731 - 1744 = 145*m for m.

Answer:
-15