Question:
Solve -1225*r = 3516*r + 99561 for r..

Answer:
-21

Question:
Solve -1786 + 1918 = -14*y + 2*y for y..

Answer:
-11

Question:
Solve -42 = 12*c - 30 for c..

Answer:
-1

Question:
Solve 9335*x - 4645*x - 4674*x - 352 = 0 for x..

Answer:
22