Question:
Solve 245*a - 128119 = 6935*a - 299879 - 403580 for a..

Answer:
86

Question:
Solve 2737*r - 552*r = -2232*r + 304773 for r..

Answer:
69

Question:
Solve -5*c + 12 = -8*c for c..

Answer:
-4

Question:
Solve 10*v + 10 - 30 = 0 for v..

Answer:
2