Предмет: Алгебра, автор: dare564

помогите решить задачу,номер 212"а"

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Автор ответа: Flash3146

300/20=15(б)-в день
15/15=1 (б)-1 человеку
#1
1×20=20 (б)-в день
20×30-300=300 (б)
#2
500/10=50 (дн)
#3
200/10=20 (ч)

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