Question: What is the solution?

Solve 3*o + 42*o = -9*o - 648 for o.

Answer: -12

Question: What is the solution?

Solve -6*j = -j - 15 for j.

Answer: 3

Question: What is the solution?

Solve 211*b + 7332 = 1635 for b.

Answer: -27

Question: What is the solution?

Solve -3*q - 14*q = 11*q for q.

Answer:
0