document.write( "Question 107229: A doctor orders 20 grams of a 52% solution of a certain medicine. The pharmacist has only bottles of 40% and bottles of 70% solution. How much of each must he use to obtain the 20 grams of the 52% solution? \n" ); document.write( "
Algebra.Com's Answer #78051 by scott8148(6628)\"\" \"About 
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let x=\"grams of 40%\", so 20-x=\"grams of 70%\" ... x(40%)+(20-x)(70%)=20(52%)\r
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\n" ); document.write( "\n" ); document.write( ".4x+1.4-.7x=10.4
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