<PRE><B>Question 156040</B>
A chemist wants 50 ml of a 16% acid solution by mixing a 13% acid solution and an 18% acid solution. How many milliliters of each solution the chemist use?
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Acid EQUATION: 0.13x + 0.18(50-x) = 0.16*50
0.13x + 9 - 0.18x = 8
-0.05x = -1
x = 20 ml (amount of 13% solution in the mix)
50- 20 = 30 ml (amount of 18% in the mix)
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Cheers,
Stan H.</PRE>