Q: What is the solution?
Solve 1209*i - 763*i + 255*i = -1515*i - 73128 for i.

A: -33

Q: What is the solution?
Solve -260*t - 663 = 18*t - 57*t for t.

A: -3

Q: What is the solution?
Solve -28 = -14*f - 84 for f.

A:
-4