Q: Solve:
Solve 0 = 1591*a + 43010 - 86241 - 158826 for a.

A: 127

Q: Solve:
Solve 3 = -1376*u + 1377*u for u.

A: 3

Q: Solve:
Solve 0 = 2*f - f - 2 for f.

A:
2