document.write( "Question 1161169: How many quarts of pure antifreeze must be added to 9 quarts of a 50% antifreeze solution to obtain a 60% antifreeze solution? \n" ); document.write( "

Algebra.Com's Answer #784634 by math_helper(2461) $\"\"$ $\"About$

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document.write( "At the start you have:
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document.write( "9 qts of solution, of which 9/2 = 4.5 qts are antifreeze\r
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document.write( "You want to add x qts of antifreeze (9/2 + x  is the final amount of 
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document.write( "antifreeze) and have the ratio of that to the total solution (9 + x) 
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document.write( "equal to 60% (0.60): \r
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document.write( "  \r
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document.write( "Solve for x = 9/4 = 2.25 qts  
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document.write( "Check:  (9/2 + 9/4) / (9 + 9/4) =  (27/4) / (45/4) = 27/45 = 3/5 = 0.60 (ok) \n" );
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