Mathematics, 09.09.2021 21:30, tipbri6380

chemical company makes two brands of antifreeze. The first brand is 45% pure antifreeze, and the second brand is 70% pure antifreeze. In order to obtain 130 gallons a mixture that contains 65% pure antifreeze, how many each brand of antifreeze must be used?

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chemical company makes two brands of antifreeze. The first brand is 45% pure antifreeze, and the sec...