document.write( "Question 522149: You need a 40% alcohol solution. On hand, you have a 650 mL of a 20% alcohol mixture. You also have 90% alcohol mixture. How much of the 90% mixture will you need to add to obtain the desired solution?\r
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\n" ); document.write( "to obtain
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Algebra.Com's Answer #346711 by mananth(16946)\"\" \"About 
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--------percent ---------------- quantity
\n" ); document.write( "Alcohol Type I 20 ---------------- 650 ml
\n" ); document.write( "Alcohol type II 90 ---------------- x ml
\n" ); document.write( "Mixture 40 ---------------- 650 + x ml
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\n" ); document.write( "20*650+90x=40(650+x)
\n" ); document.write( "13000+90x=26000 +40x
\n" ); document.write( "90x-40x =26000-( -13000)
\n" ); document.write( "50x=13000
\n" ); document.write( "/50
\n" ); document.write( "x= 260
\n" ); document.write( "260 ml of Alcohol type II (90%)
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