Q: What is the solution?
Solve -4*y - 28 - 15 - 1 = 0 for y.

A: -11

Q: What is the solution?
Solve -113*n + 106*n + 28 = 0 for n.

A: 4

Q: What is the solution?
Solve 35 - 143 = -14*r + 17*r for r.

A:
-36