Solve -61*c - 336 - 542 + 140 = -20*c for c.
Solve this plz.

A: -18

Solve b = 35 - 29 for b.
Solve this plz.

A: 6

Solve -133242*u + 133219*u + 322 = 0 for u.
Solve this plz.

A:
14