Solve 180*h + 7930 = -9217 + 6347 for h.
Solve this plz.

A: -60

Solve -1655*n - 150 = -1630*n for n.
Solve this plz.

A: -6

Solve -1 - 15 = -4*i for i.
Solve this plz.

A:
4