Question:
Solve 16*x + 12 = 22*x for x..

Answer:
2

Question:
Solve -2011*c - 52920 = 11432 for c..

Answer:
-32

Question:
Solve 639*r + 1803240 = 1754037 for r..

Answer:
-77

Question:
Solve 3201 + 2009 - 1338 = -352*l for l..

Answer:
-11