Mathematics, 11.03.2021 14:00 ninilizovtskt

There were 3 times as many boys as girls in a museum. After 75 boys left and 25 girls entered, there were 2 times as many girls as boys. If 90 children remained, how many children were in the museum at first? *

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There were 3 times as many boys as girls in a museum. After 75 boys left and 25 girls entered, there...

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