document.write( "Question 1105685: tin that was 35% pure was melted together with tin that was 45% pure to make 20 kilograms of an alloy that was 39% pure. how many kilograms of each were used \n" ); document.write( "
Algebra.Com's Answer #720558 by josgarithmetic(39620)\"\" \"About 
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x of the 35% tin alloy
\n" ); document.write( "20-x of the 45% tin alloy\r
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\n" ); document.write( "\n" ); document.write( "\"35x%2B45%2820-x%29=39%2A20\"
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