Question: What is the solution?

Solve 42*o - 598 = -724 for o.

Answer: -3

Question: What is the solution?

Solve 20*o + 262 + 136 - 178 = 0 for o.

Answer: -11

Question: What is the solution?

Solve -19850*w + 19917*w = 134 for w.

Answer: 2

Question: What is the solution?

Solve 30*s - 70 + 40 = 0 for s.

Answer:
1