Предмет: Математика, автор: animetopaot

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Автор ответа: Kormash

4:(2/5)=4•(5/2)=10 (км/год)-велосипедиста
4x+10x=42
14х=42
x=3
Відповідь: 3 години після початку руху вони зустрінуться

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