document.write( "Question 213388: how many gallons of pure alcohol should b mixed with 20 gallons of a 15% alchol solution to obtain a mixture that is 25% alcohol? \n" ); document.write( "
Algebra.Com's Answer #161178 by RAY100(1637)\"\" \"About 
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Let x = gallons of pure(100%) alcohol added
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\n" ); document.write( "x(1.00) +20(.15) = (20 +x)(.25)
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\n" ); document.write( "x+3=5+.25x,,,,,,,,,alcohol balance
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\n" ); document.write( ",75 x = 2
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\n" ); document.write( "x=2.67 gallons
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\n" ); document.write( "check,,,2.67 +3 = 22.67 * .25 = 5.67,,,,,ok
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