Solve 0 = 605*b - 490*b + 1610 for b.
Solve this plz.

A: -14

Solve 302*r - 2745 = -3*r for r.
Solve this plz.

A: 9

Solve -135*v + 2136 = 105*v + 27*v for v.
Solve this plz.

A:
8