Question:
Solve -2*u - 108 = -108 for u..

Answer:
0

Question:
Solve 10*l - 28*l + 621 = 51*l for l..

Answer:
9

Question:
Solve -29*x + 584 - 143 + 226 = 0 for x..

Answer:
23

Question:
Solve 208056 - 209614 = 38*k for k..

Answer:
-41