document.write( "Question 462040: How many gallons of 80% antifreeze solution must be mixed with 100 gallons of 10% antifreeze to get a mixture that is 70%antifreeze?
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Algebra.Com's Answer #316818 by jorel1380(3719)\"\" \"About 
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.8n+100(.1)=.7(n+100)
\n" ); document.write( ".8n+10=.7n+70
\n" ); document.write( ".1n=60
\n" ); document.write( "n=60/.1=600
\n" ); document.write( "You need 600 gallons of 80% antifreeze for your mix.
\n" ); document.write( ".8(600)+100(.1)=480+10=490
\n" ); document.write( ".7(600+100)=.7(700)=490..
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