Q: Solve 368*d = -473*d + 21025 for d.

A: 25

Q: Solve 10 = -24*b + 14*b for b.

A: -1

Q: Solve 109 + 15 = 31*i for i.

A: 4

Q: Solve x - 57 + 58 = 0 for x.

A:
-1