Q: Solve:
Solve 3209 = 139*a + 1526 - 1653 for a.

A: 24

Q: Solve:
Solve 4 = 3*r - 5 for r.

A: 3

Q: Solve:
Solve 80*h - 922*h + 105213 = 1221*h for h.

A:
51