document.write( "Question 733274:
\n" ); document.write( "How many gallons of pure antifreeze must be mixed with 30 gallons of 15% antifreeze to get a mixture that is 40% antifreeze ?
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Algebra.Com's Answer #448330 by stanbon(75887)\"\" \"About 
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How many gallons of pure antifreeze must be mixed with 30 gallons of 15% antifreeze to get a mixture that is 40% antifreeze ?
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\n" ); document.write( "Equation:
\n" ); document.write( "anti + anti = anti
\n" ); document.write( "1*x + 0.15*30 = 0.40(x+30)
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\n" ); document.write( "100x + 15*30 = 40x + 40*30
\n" ); document.write( "60x = 25*30
\n" ); document.write( "x = 12.5 gallons (amt. of pure anti to add)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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