Question 67216
(4000(92%) - x(100%))/(4000 - x) = 80%
4000(0.92) - x(1.0) = (4000 - x)80%
3680 - x = 3200  - 0.8x
480 = 0.2x
2400 = x
2,400 liters of pure alcohol had to be removed.