Q: Solve:
Solve -238*d + 21*d + 2921 = -12703 + 3472 for d.

A: 56

Q: Solve:
Solve -5*h - 12 = -h for h.

A: -3

Q: Solve:
Solve 235*k + 312 = 150*k - 538 for k.

A:
-10