Q: Solve -708*o + 538*o + 19980 = 2050*o for o.

A: 9

Q: Solve 126*x + 153*x - x + 13821 = 7*x for x.

A: -51

Q: Solve 84*r = -123*r - 653*r - 7740 for r.

A: -9

Q: Solve 184*p - 168 = -1824 for p.

A:
-9