Solve 0 = 1492*p - 1421*p + 71 for p.
Solve this plz.

A: -1

Solve -176185*n = -176176*n - 171 for n.
Solve this plz.

A: 19

Solve 40*r = 84 - 364 for r.
Solve this plz.

A:
-7