Solve 75*p - 42*p + 3393 = -84*p for p.
Solve this plz.

A: -29

Solve 0 = 56*r - 413 + 77 for r.
Solve this plz.

A: 6

Solve 11*n - 160 + 72 = 0 for n.
Solve this plz.

A:
8