<PRE><B>Question 540941</B>
A store has 20 pounds of trail mix that is 3 part raisins to 2 part nuts. They have available another mix that is 1 part raisin to 3 part nuts. How much of this second mix should be added to the 20 pounds to give a mix that is equal parts of raisins and nuts? 
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Follow the raisins:
raisins + raisins = raisins
(3/5)20 + (1/4)x = (1/2)(20+x)
Multiply thru by 20:
12*20 + 5x = 10(20+x)
12*20 + 5x = 10*20 + 20x
15x = 2*20
x = 8/3 lb (amt of the 2nd mix needed)
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Cheers,
Stan H.
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