Solve 0 = 258*h + 6790 - 1888 for h.
Solve this plz.

A: -19

Solve 13416 = -923*y - 1278*y - 30604 for y.
Solve this plz.

A: -20

Solve -12401*a + 24910*a - 12328*a - 11403 = 0 for a.
Solve this plz.

A:
63