Q: Solve 812*r - 181656 = 1561*r + 1774*r for r.

A: -72

Q: Solve -15*s = 6*s + 74 - 158 for s.

A: 4

Q: Solve -34*w - 607 - 777 = -194 for w.

A: -35

Q: Solve 204*b + 348 = 889 + 2519 for b.

A:
15