Question 817377
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Hi,
How many liters each of 35% and 60% alcohol solutions must be mixed together 
to make 40 liters of a 53% alcohol solution?
{{{60x + 35(40L-x) = 53*40L}}}   |After multiplying thru by 100
        25x = 18*40L
          x = 28.8L of the 60%  and 11.2L of the 35%