Question: What is the solution?

Solve 39 + 28 - 7 = -6*h for h.

Answer: -10

Question: What is the solution?

Solve 552*s - 140 = 1122*s - 556*s for s.

Answer: -10

Question: What is the solution?

Solve -10 = x - 8 for x.

Answer: -2

Question: What is the solution?

Solve 61*o + 19*o + 186 = -106*o for o.

Answer:
-1