Solve 0 = -840*u - 15306 + 33786 for u.
Solve this plz.

A: 22

Solve -5*w + 167 - 172 = 0 for w.
Solve this plz.

A: -1

Solve -2349 = 105*i - 291*i + 6579 for i.
Solve this plz.

A:
48