Solve 0 = 422*k - 412*k for k.
Solve this plz.

A: 0

Solve -1213*f - 1742 + 19862 + 21911 = 1215 for f.
Solve this plz.

A: 32

Solve 0 = 4*t - 39 + 35 for t.
Solve this plz.

A:
1