Hi,

Let x represent the amount of the 8% solution, 

then (1L-x) would be the amount of the 6% solution

.08x + .06(lL -x) = .064*1L

solving for x

.08x + .06*1L - .06x = .064*1L

.02x = .004L

x = .2L of the the 8% solution and .8L of the 6% solution   (1L-.2L)



 

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