document.write( "Question 765808: how many gallons of a 90 antifreeze solution must be mixed with 100 gallons of 25 antifreeze to get a mixture that is 80% antifreeze
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Algebra.Com's Answer #466437 by stanbon(75887)\"\" \"About 
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how many gallons of a 90 antifreeze solution must be mixed with 100 gallons of 25 antifreeze to get a mixture that is 80% antifreeze
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\n" ); document.write( "Equation::
\n" ); document.write( "0.90x + 0.25*100 = 0.80(x+100)
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\n" ); document.write( "90x + 25*100 = 80x + 80*100
\n" ); document.write( "10x = 55*100
\n" ); document.write( "x = 550 gallons (amt. of 90% solution needed)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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