Solve -581*k + 55463 = -1397*k - 683*k for k.
Solve this plz.

A: -37

Solve -30933 = 987*u + 1231*u - 1584*u + 19153 for u.
Solve this plz.

A: -79

Solve -10*q - 7 = -3*q for q.
Solve this plz.

A:
-1