Question: What is the solution?

Solve -a - 13 + 9 = 16 for a.

Answer: -20

Question: What is the solution?

Solve -22*o - 5*o + 60350 = 59459 for o.

Answer: 33

Question: What is the solution?

Solve -6 = 2*k - 4 for k.

Answer: -1

Question: What is the solution?

Solve 0 = 13*h - 11*h - 2 for h.

Answer:
1