Solve 303*r - 291*r - 39 = -111 for r.
Solve this plz.

A: -6

Solve 31*j - 247*j - 977 - 1723 + 324 = 0 for j.
Solve this plz.

A: -11

Solve 396 = -2769*z + 2901*z for z.
Solve this plz.

A:
3