Q: Solve -42*r - 27 - 15 = 0 for r.

A: -1

Q: Solve 8*b - 9 = -b for b.

A: 1

Q: Solve 3231 - 1509 = 246*w for w.

A: 7

Q: Solve 1660 = -87*j + 4*j for j.

A:
-20