Question:
Solve 21*l = -583*l - 21414 - 6370 for l..

Answer:
-46

Question:
Solve 1318*d + 44528 = 3254*d for d..

Answer:
23

Question:
Solve -12*c = 40*c + 312 for c..

Answer:
-6

Question:
Solve 9*r + 29*r + 480 = -10*r for r..

Answer:
-10