document.write( "Question 843242: How many gallons of a 90% antifreeze solution must be mixed with 90 gallons of 30% antifreeze to get a mixture that is 80% antifreeze?\r
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Algebra.Com's Answer #508028 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "How many gallons  of a 90% antifreeze solution must be mixed 
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document.write( "with 90 gallons of 30% antifreeze to get a mixture that is 80% antifreeze?
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document.write( "   .90x + .30(90gal) = .80(90gal + x)
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document.write( "          x =  .50(90gal)/.10 = 450gal \n" );
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