document.write( "Question 489416: How many gallons of 60% antifreeze needs to be mixed with 60 gallons of 20% antifreeze to make a mixture of 50% antifreeze? I am told to use the six step method and i am not too sure what that is. \n" ); document.write( "
Algebra.Com's Answer #333658 by jorel1380(3719)\"\" \"About 
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n(.6)+60(.2)=(n+60)(.5)
\n" ); document.write( ".6n+12=.5n+30
\n" ); document.write( ".1n=18
\n" ); document.write( "n=18/.1=180 gallons of 60% antifreeze needed..
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