Question: What is the solution?

Solve -55*i + 9*i + 840 = -18*i for i.

Answer: 30

Question: What is the solution?

Solve 0 = -21*o - 31 + 52 for o.

Answer: 1

Question: What is the solution?

Solve 0 = -17*l - 7*l + 48 for l.

Answer: 2

Question: What is the solution?

Solve 11 = 4*m - 9 for m.

Answer:
5