Solve 23*c - 317 = 28 for c.
Solve this plz.

A: 15

Solve 0 = -16*m - 6*m + 21*m - 6 for m.
Solve this plz.

A: -6

Solve 0 = -26*d + 137 - 7 for d.
Solve this plz.

A:
5