Question:
Solve -779 = 2*w - 787 for w..

Answer:
4

Question:
Solve -11*l + 8 = -7*l for l..

Answer:
2

Question:
Solve 1035 = 19*c + 1263 for c..

Answer:
-12

Question:
Solve -l - 5*l = 12 for l..

Answer:
-2