Solve 0 = -285*r - 521 - 2329 for r.
Solve this plz.

A: -10

Solve -550 = 113*v - 58*v for v.
Solve this plz.

A: -10

Solve 17*r - 10*r = 35*r + 84 for r.
Solve this plz.

A:
-3