Solve 3128*r + 3038*r + 105469 = 5007*r for r.
Solve this plz.

A: -91

Solve 6*p + 12*p = 15*p for p.
Solve this plz.

A: 0

Solve 36*b - 2 = 37*b for b.
Solve this plz.

A:
-2