Question 408138
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Hi
Let x and (8L-x)represent the amounts of the 60% and 40% solutions respectively
Question states***
 .60x + .40(8L-x) = .55*8L
Solving for x
       .20x =  .15*8L  x = 6L, amount of 60%,  2L of 40%.  (8L-6L)
CHECKING our Answer***
  .6*6 + .4*2 = 4.4 = .55*8