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 #101316 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"w\"$ = mass of whole wheat flour
\n" ); document.write( "Let $\"b\"$ = mass of organic barley flour
\n" ); document.write( " $\"w+%2B+b++=+20\"$ kg
\n" ); document.write( " $\"b+=+20+-+w\"$
\n" ); document.write( " $\"%282.19w+%2B+1.89b%29+%2F+20+=+1.99\"$
\n" ); document.write( " $\"2.19w+%2B+1.89b+=+20%2A1.99\"$
\n" ); document.write( " $\"2.19w+%2B+1.89%2A%2820+-+w%29+=+39.8\"$
\n" ); document.write( " $\"2.19w+%2B+37.8+-+1.89w+=+39.8\"$
\n" ); document.write( " $\".3w+=+2\"$
\n" ); document.write( " $\"w+=+6.67\"$
\n" ); document.write( " $\"b+=+20+-+6.67\"$
\n" ); document.write( " $\"b+=+13.33\"$
\n" ); document.write( "6.667 kg of the whole wheat anfd 13.333 kg of the barley are needed
\n" ); document.write( "check:
\n" ); document.write( " $\"2.19%2A6.67+%2B+1.89%2A13.33%29+%2F+20+=+1.99\"$
\n" ); document.write( " $\"%2814.6+%2B+25.2%29+%2F20+=+1.99\"$
\n" ); document.write( " $\"39.8+%2F+20+=+1.99\"$
\n" ); document.write( " $\"1.99+=+1.99\"$ \n" ); document.write( "

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