Solve 10 = 18*c - 13*c for c.
Solve this plz.

A: 2

Solve 40*l + 31*l = 923 for l.
Solve this plz.

A: 13

Solve 22*k + 31*k - 66*k - 221 = 0 for k.
Solve this plz.

A:
-17