document.write( "Question 551635: housewife wishes to mix coffee beans worth Php60 and Php85 a kilogram to obtain 50 kilograms of coffee beans worth Php70 a kilogram. How many kilograms of each should she use? \n" ); document.write( "
Algebra.Com's Answer #359810 by nerdybill(7384)\"\" \"About 
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housewife wishes to mix coffee beans worth Php60 and Php85 a kilogram to obtain 50 kilograms of coffee beans worth Php70 a kilogram. How many kilograms of each should she use?
\n" ); document.write( "Let x = amount (kilograms) of Php60 coffee beans
\n" ); document.write( "then
\n" ); document.write( "50-x = amount (kilograms) of Php85 coffee beans
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\n" ); document.write( "60x + 85(50-x) = 70(50)
\n" ); document.write( "60x + 4250-85x = 3500
\n" ); document.write( "4250-25x = 3500
\n" ); document.write( "-25x = 3500-4250
\n" ); document.write( "-25x = -750
\n" ); document.write( "x = 30 kilograms of Php60 coffee beans
\n" ); document.write( ".
\n" ); document.write( "Php85 coffee beans:
\n" ); document.write( "50-x = 50-30 = 20 kilograms\r
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