Question: What is the solution?

Solve -61*c - 59*c + 1311 = -729 for c.

Answer: 17

Question: What is the solution?

Solve -104*i + 12 = -107*i for i.

Answer: -4

Question: What is the solution?

Solve 114 = 38*a - 190 for a.

Answer: 8

Question: What is the solution?

Solve 26991 + 1629 = 1140*j + 291*j for j.

Answer:
20