Q: Solve:
Solve -22 = -13*d + 15*d for d.

A: -11

Q: Solve:
Solve -17*h + 122*h - 62*h - 1290 = 0 for h.

A: 30

Q: Solve:
Solve 2127*q - 2112*q = -105 for q.

A:
-7