Question 408964
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Hi
combine to obtain 12 liters
Let x and (12L-x) represent the amount of %14 and %8 solution respectively
Question states***
 .14x + .08(12L-x) = .10*12L
Solving for x
    .06x = .02*12L
       x = 4L, the amount of 14% solution.  8L of 8% solution.  (12L-4L)

CHECKING our Answer***
  .14*4L + .08*8L = .56L + .64L = 1.2L