Q: What is the solution?
Solve -12*i - 30877 = -8*i + 9*i - 30630 for i.

A: -19

Q: What is the solution?
Solve 86*d = 59*d - 140*d + 1670 for d.

A: 10

Q: What is the solution?
Solve -82 + 20 = 31*v for v.

A:
-2