Question: What is the solution?

Solve -69 = -30*s + 7*s for s.

Answer: 3

Question: What is the solution?

Solve -458 + 383 - 673 = 44*w for w.

Answer: -17

Question: What is the solution?

Solve -12 + 23 - 61 = 10*h for h.

Answer: -5

Question: What is the solution?

Solve 52*m + 50 = 42*m for m.

Answer:
-5