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Mathematics, 14.04.2020 18:54 Wolfzbayne

Your friends piano lesson lasts 15 minutes longer than your piano lesson. You have 6 lessons per month and your friend has 4 lessons per month. At the end of the month, your time spent at piano lessons is the same as your friends time. How may minutes is your friends piano lesson

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Your friends piano lesson lasts 15 minutes longer than your piano lesson. You have 6 lessons per mon...

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