Q: Solve:
Solve -11334 = 258*u - 1020*u + 18384 for u.

A: 39

Q: Solve:
Solve -106*l + 183*l = -1078 for l.

A: -14

Q: Solve:
Solve -189*a - 804 = -11*a + 23*a for a.

A:
-4