document.write( "Question 836291: Doreen is a chemist. She needs to prepare 36 ounces of a 13% hydrochloric acid solution. find the amount of 18% solution and amount of 9% solution she should mix to get the solution...How do I solve this??? Please help me. \n" ); document.write( "
Algebra.Com's Answer #504100 by nerdybill(7384)\"\" \"About 
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Doreen is a chemist. She needs to prepare 36 ounces of a 13% hydrochloric acid solution. find the amount of 18% solution and amount of 9% solution she should mix to get the solution.
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\n" ); document.write( "Let x = amount (ounces) of 18% solution
\n" ); document.write( "then
\n" ); document.write( "36-x = amount (ounces) of 9% solution
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\n" ); document.write( ".18x + .09(36-x) = .13(36)
\n" ); document.write( ".18x + 3.24-.09x = 4.68
\n" ); document.write( ".09x + 3.24 = 4.68
\n" ); document.write( ".09x = 1.44
\n" ); document.write( "x = 16 ounces of 18% solution
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\n" ); document.write( "amount of 9% solution:
\n" ); document.write( "36-x = 36-18 = 18 ounces
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