Q: What is the solution?
Solve 1653*z + 15 = 1658*z for z.

A: 3

Q: What is the solution?
Solve u + 0 = 5 for u.

A: 5

Q: What is the solution?
Solve -36*r + 160*r = 38*r + 1376 for r.

A:
16