Solve 17*x = 15*x - 12 for x.
Solve this plz.

A: -6

Solve 0 = 240*p - 231 - 663 - 786 for p.
Solve this plz.

A: 7

Solve -409*t = -109*t - 1322 - 3778 for t.
Solve this plz.

A:
17