Question: What is the solution?

Solve -5*i - 589 = -584 for i.

Answer: -1

Question: What is the solution?

Solve -d - 360 = -370 for d.

Answer: 10

Question: What is the solution?

Solve 129*x - 98*x = -217 for x.

Answer: -7

Question: What is the solution?

Solve 3013961*f = 3013976*f + 45 for f.

Answer:
-3