Question: What is the solution?

Solve 0 = 5*z + 198*z - 66 + 472 for z.

Answer: -2

Question: What is the solution?

Solve 4*z - 185 = -305 for z.

Answer: -30

Question: What is the solution?

Solve -24 = -4*o - 20*o for o.

Answer: 1

Question: What is the solution?

Solve 35*h + 57*h = 56*h for h.

Answer:
0