document.write( "Question 3281: A specialty coffee store creates a special mix of two coffees at two different prices: $6.42 and $7.28 per pound each. How many pounds of the $7.28 coffee should be mixed with 7 pounds of $6.42 coffee to sell the mixture for $7.20 per pound? \n" ); document.write( "
Algebra.Com's Answer #1431 by sujatha.krishna(11)\"\" \"About 
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Assume x is the number of pounds of 7.28 coffee.
\n" ); document.write( "So x pounds of 7.28 is mixed with 7 pounds of 6.42 coffee to get a per pound rate of 7.20. So the formula to calculate will be - \r
\n" ); document.write( "\n" ); document.write( " (x*7.28) + (7*6.42)
\n" ); document.write( " --------------------------- = 7.20
\n" ); document.write( " 7+x\r
\n" ); document.write( "\n" ); document.write( "7.28x + 44.94 = 7.20 (7 +x)\r
\n" ); document.write( "\n" ); document.write( "7.28x + 44.94 = 50.4 + 7.20x\r
\n" ); document.write( "\n" ); document.write( ".08x = 5.46\r
\n" ); document.write( "\n" ); document.write( "x = 68.25
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