Solve 15*d - 15 = 15 for d.
Solve this plz.

A: 2

Solve 0 = 2*t + 11 - 7 for t.
Solve this plz.

A: -2

Solve 319*a - 674*a - 2128 = -317*a for a.
Solve this plz.

A:
-56