Solve -1160*r + 6885*r + 561050 = 0 for r.
Solve this plz.

A: -98

Solve 0 = -103*x + 589882 - 585762 for x.
Solve this plz.

A: 40

Solve -13*s - 23*s = 21*s - 2508 for s.
Solve this plz.

A:
44