Q: Solve 0 = 15*s - 490*s - 567*s + 13546 for s.

A: 13

Q: Solve 0 = 38*r - 38 for r.

A: 1

Q: Solve 991*x = 981*x - 60 for x.

A: -6

Q: Solve -18178 = 19684*b - 19550*b - 1562 for b.

A:
-124