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Mathematics, 29.09.2019 19:00 gungamer720

Idont understamd this problem

a work crew has a new pump and an old pump. the new pump can fill a tank in 5 hours, and the old pump can fill the same tank in 7 hours. write and solve and equation for the time it will take both pumps to fill one tank of the pumps are used together.

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Idont understamd this problem

a work crew has a new pump and an old pump. the new pump...
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