Solve 26*n = 30*n + 28 for n.
Solve this plz.

A: -7

Solve 13*m = 35*m - 16*m - 84 for m.
Solve this plz.

A: 14

Solve 87*d = 119 + 47 - 253 for d.
Solve this plz.

A:
-1