Q: Solve 1586 + 533 = -130*p + 559 for p.

A: -12

Q: Solve -4*y - 3886 = 51*y + 79*y for y.

A: -29

Q: Solve 7*r = -22*r for r.

A: 0

Q: Solve 1250*r + 1326*r + 421362 = -1021*r - 1605*r for r.

A:
-81