Question 362050
AF starting amount ___ 1.5 or 3/2 L (or 9/6)


AF amount drained ___ (1.5)(1 / 4.5) = 1/3 L or 2/6


AF current amount ___ (9/6) - (2/6) + (6/6) = 13/6


current concentration ___ (13/6) / (9/2) = 13/27


[(9/2) - x](13/27) + (x)(100%) = (9/2)(50%)


(13/6) - (13x/27) + x = 9/4


multiplying by 108 (LCD) ___ 236 - 52x + 108x = 243 ___ 56x = 7


x = 1/8 L