Q: Solve -42*u - 203 = -413 for u.

A: 5

Q: Solve 81*y = 80*y + 2 for y.

A: 2

Q: Solve -646*x = -3337*x + 131859 for x.

A: 49

Q: Solve 96*f - 134*f - 153*f = 81*f for f.

A:
0