Mathematics, 19.05.2021 16:00, kiwipup16

A tank can be filled by one pipe in 9 minutes and drained by another pipe in 12 minutes. Write an equation that could be used to determine how long it will take to fill the tank if the two pipes are open at the same time.

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A tank can be filled by one pipe in 9 minutes and drained by another pipe in 12 minutes. Write an eq...