Q: Solve:
Solve 3752 + 1239 - 666 = -62*b + 419 for b.

A: -63

Q: Solve:
Solve 74*l + 210 = -87*l + 196*l for l.

A: 6

Q: Solve:
Solve 5*r + 21*r = -540 + 488 for r.

A:
-2