Solve 874*d + 52516 = -523*d - 8952 for d.
Solve this plz.

A: -44

Solve 6*r = 2 + 4 for r.
Solve this plz.

A: 1

Solve 0 = 8532*o - 8557*o - 400 for o.
Solve this plz.

A:
-16