document.write( "Question 335306: a certain alloy contails 75% copper and a second alloy 35% copper. how many kilograms of the second alloy must be added to 62 kilograms of the first to form an alloy that is 50% copper? \n" ); document.write( "
Algebra.Com's Answer #240335 by Fombitz(32388)\"\" \"About 
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Let A be the amount of 35% alloy.
\n" ); document.write( "\"62%2875%29%2BA%2835%29=%2865%2BA%29%2850%29\"
\n" ); document.write( "\"4650%2B35A=3250%2B50A\"
\n" ); document.write( "\"15A=1400\"
\n" ); document.write( "\"A=280%2F3\"kg
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