Solve 174*h - 181*h + 63 = 0 for h.
Solve this plz.

A: 9

Solve -29501*n - 228 = -29489*n for n.
Solve this plz.

A: -19

Solve 38003 = 3712*b - 4139*b for b.
Solve this plz.

A:
-89