Q: What is the solution?
Solve -d = 5*d - d for d.

A: 0

Q: What is the solution?
Solve 190*y = 270*y - 192*y - 3696 for y.

A: -33

Q: What is the solution?
Solve -82*r - 35895 - 35916 = 312*r - 17833 for r.

A:
-137