Question: What is the solution?

Solve 0 = 12*i + 59*i + 9*i - 320 for i.

Answer: 4

Question: What is the solution?

Solve -133*d - 1713 + 10092 = 0 for d.

Answer: 63

Question: What is the solution?

Solve 861*c + 5364 = -7551 for c.

Answer: -15

Question: What is the solution?

Solve -312 = 8*a - 60*a for a.

Answer:
6