document.write( "Question 138848: Organic whole-wheat flour sells for $2.19/kg. Organic barley flour sells for $1.89/kg. What mass of each type of flour should be included in 20kg of a blend that sells for $1.99/kg ? \n" ); document.write( "
Algebra.Com's Answer #101309 by checkley77(12844)\"\" \"About 
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2.19x+1.89(20-x)=20*1.99
\n" ); document.write( "2.19x+37.8-1.89x=39.8
\n" ); document.write( ".3x=39.8-37.8
\n" ); document.write( ".3x=2
\n" ); document.write( "x=2/.3
\n" ); document.write( "x=6.67 kg. of $2.19 wheat flour.
\n" ); document.write( "20-6.67=13.33 kg. of $1.89 barley flour.
\n" ); document.write( "proof:
\n" ); document.write( "2.19*6.67+1.89*13.33=39.8
\n" ); document.write( "14.6+25.2=39.8
\n" ); document.write( "39.8=39.8\r
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