Q: Solve -2510*z + 450 = -2960*z for z.

A: -1

Q: Solve 9*r - 288 = 38*r + 3*r for r.

A: -9

Q: Solve -213*f + 0 - 5 = -5 for f.

A: 0

Q: Solve -1071 - 1469 = -127*z for z.

A:
20