Q: What is the solution?
Solve -31*p + 678 = -144*p for p.

A: -6

Q: What is the solution?
Solve -7*w + 4*w = 7*w - 30 for w.

A: 3

Q: What is the solution?
Solve 5*z + 2 = 4*z for z.

A:
-2