document.write( "Question 71088: Star Cups, 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? \r
\n" ); document.write( "\n" ); document.write( "x+7 pounds = total quanity of mixture.
\n" ); document.write( "6.42(7) + 7.28x = 7.20 (x+7)
\n" ); document.write( "642(7)+728=720 (x+7)
\n" ); document.write( "4494 + 728x = 720x +5040
\n" ); document.write( "4494 +728x=720x + 5040
\n" ); document.write( "4494 +728x-720x=720x-720=5040
\n" ); document.write( "28x =546
\n" ); document.write( "7x/7x=546/7
\n" ); document.write( "x=72\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #50820 by checkley75(3666) $\"\"$ $\"About$

You can put this solution on YOUR website!
7*6.42+7.28x=7.20(x+7)
\n" ); document.write( "44.94+7.28x=7.20x+50.40
\n" ); document.write( "7.28x-7.20x=50.40-44.94
\n" ); document.write( ".08x=5.46
\n" ); document.write( "x=5.46/.08
\n" ); document.write( "x=68.25 pounds of $7.28 coffee is needed
\n" ); document.write( "proof
\n" ); document.write( "7*6.42+7.28*68.25=7.20*75.25
\n" ); document.write( "44.94+496.86=541.8
\n" ); document.write( "541.8=541.8
\n" ); document.write( "----------------------------------------
\n" ); document.write( "you have too many = signas & you drop the x factor in your calculations.
\n" ); document.write( "you need to be more careful in your tranferring your values in each step.
\n" ); document.write( " \n" ); document.write( "

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