document.write( "Question 733274:
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document.write( "How many gallons of pure antifreeze must be mixed with 30 gallons of 15% antifreeze to get a mixture that is 40% antifreeze ? \n" );
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Algebra.Com's Answer #448330 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! How many gallons of pure antifreeze must be mixed with 30 gallons of 15% antifreeze to get a mixture that is 40% antifreeze ? \n" ); document.write( "----- \n" ); document.write( "Equation: \n" ); document.write( "anti + anti = anti \n" ); document.write( "1*x + 0.15*30 = 0.40(x+30) \n" ); document.write( "----- \n" ); document.write( "100x + 15*30 = 40x + 40*30 \n" ); document.write( "60x = 25*30 \n" ); document.write( "x = 12.5 gallons (amt. of pure anti to add) \n" ); document.write( "================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "================ \n" ); document.write( " |