Solve 268*u - 282*u + 42 = 0 for u.
Solve this plz.

A: 3

Solve -2584 - 13346 = -223*k - 662*k for k.
Solve this plz.

A: 18

Solve 335*p + 3568 - 553 = 0 for p.
Solve this plz.

A:
-9