Question:
Solve 0 = 2*l + 206 - 200 for l..

Answer:
-3

Question:
Solve -120*c - 3465 = -825 for c..

Answer:
-22

Question:
Solve 645*w - 688*w = 387 for w..

Answer:
-9

Question:
Solve 0 = -14*l - 3*l + 68 for l..

Answer:
4