Solve 1073*r = 1385*r - 8736 for r.
Solve this plz.

A: 28

Solve 0 = 10*b - 6*b + 4 for b.
Solve this plz.

A: -1

Solve 0 = 299*v - 7*v - 4621 - 3263 for v.
Solve this plz.

A:
27