Question 391849
A chemist has one solution that is 30% pure salt and another is 60% pure salt. how many ounces of each solution must he use to produce 60 ounces of a solution that is 50 % salt. 

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Equation:
salt + salt = salt
0.30x + 0.60(60-x) = 0.50*60
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Multiply thru by 100 to get:
30x + 60*60-60x = 50*60
-30x = -10*60
x = 20 oz (amt. of 30% solution needed in the mix)
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60-x = 40 oz (amt. of 60% solution needed in the mix)
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Cheers,
stan H.