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Container X contained 1200 g of sand. Container Y contained 7.2 kg of sand. After an equal amount of sand was removed from each container, Container Y now has 7 times as much sand as Container X. How much sand was removed from each container?

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7 * (1200 - r) = 7200 - r

This question is the hardest question I had ever seen!

Pretty hard

The ans is 0.2

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