Question: What is the solution?

Solve 0 = 3*o + 31 - 16 for o.

Answer: -5

Question: What is the solution?

Solve -9*g - 27 = 63 for g.

Answer: -10

Question: What is the solution?

Solve 307140 = 4157*j - 191700 for j.

Answer: 120

Question: What is the solution?

Solve -9 = -7*q + 16*q for q.

Answer:
-1