document.write( "Question 492752: i am trying to get the equation for a mixture problem.\r
\n" ); document.write( "\n" ); document.write( "You have 7 ounces of 30% glucose solution. How much 30% glucose solution and how much water needs to be used to make 7 ounces of 20% solution?\r
\n" ); document.write( "\n" ); document.write( "my equation i tried is
\n" ); document.write( ".30(7) + x = .20(7-x)
\n" ); document.write( "is this the right equation to start the problem?\r
\n" ); document.write( "\n" ); document.write( "Thank you for the help \n" ); document.write( "
Algebra.Com's Answer #335174 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
You have 7 ounces of 30% glucose solution. How much 30% glucose solution and how much water needs to be used to make 7 ounces of 20% solution?
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\n" ); document.write( "Equation:
\n" ); document.write( "sugar + sugar = sugar
\n" ); document.write( "0.30*7 + 0*x = 0.20(7+x)
\n" ); document.write( "----
\n" ); document.write( "Multiply thru by 100 to get:
\n" ); document.write( "30*7 + 0 = 20*7 + 20x
\n" ); document.write( "20x = 10*7
\n" ); document.write( "x = 3.5 ounces (amt. of water that should be added)
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\n" ); document.write( "Proof that this is the correct answer:
\n" ); document.write( "0.3*7 = 2.1 oz of sugar
\n" ); document.write( "0.2(7+3.5) = 0.2(10.5) = 2.1 oz of sugar
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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