The owner of a tow truck wishes to change the mixture of antifreeze in his radiator. The radiator contains $15.5$ quarts of $35 \%$ antifreeze solution. How much would he need to drain and replace with pure antifreeze in order to get a $55 \%$ antifreeze solution?

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The Answer of The owner of a tow truck wishes to change the mixture of antifreeze in his radiator. The radiator contains $15.5$ quarts of $35 \%$ antifreeze solution. How much would he need to drain and replace with pure antifreeze in order to get a $55 \%$ antifreeze solution?

The Owner of a Tow Truck Wishes to Change the Mixture