Q: What is the solution?
Solve -4 - 13 + 17 = 2*d for d.

A: 0

Q: What is the solution?
Solve -21519 = 129*i - 843*i + 7709 - 4952 for i.

A: 34

Q: What is the solution?
Solve -146*i - 3707 = -7196 - 2268 - 5485 for i.

A:
77