document.write( "Question 285111: How many gallons of water should be added to 30 gallons of a solution that is 70% antifreeze in order to obtain a mixture that is 60% antifreeze? \n" ); document.write( "
Algebra.Com's Answer #206727 by richwmiller(17219)\"\" \"About 
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\n" ); document.write( "from the standpoint of antifreeze\r
\n" ); document.write( "\n" ); document.write( ".7*30=.60*(30+x)
\n" ); document.write( "2.10=1.80+.6x
\n" ); document.write( ".30=.6x
\n" ); document.write( "5=x
\n" ); document.write( "x= 5 gallons of water\r
\n" ); document.write( "\n" ); document.write( "from the standpoint of water
\n" ); document.write( "(.3*30)+x=(30+x)*.4
\n" ); document.write( "9+x=12.+.4x
\n" ); document.write( ".6x=3
\n" ); document.write( "multiply by 10
\n" ); document.write( "6x=30
\n" ); document.write( "x=5 gallons of water
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