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MGSM / Том сажает по 10 деревьев в год. И каждый год он срубает по 2 дерева. Он…

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Том сажает по 10 деревьев в год. И каждый год он срубает по 2 дерева. Он начинает с 50 деревьев. Через 10 лет 30 % деревьев погибают. Сколько деревьев у него осталось?

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