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Для уроков труда купили 40 листов красной бумаги и 30 листов синей и заплатили за все 1р.40к. Сколько денег уплатили за красную и сколько денег уплатили за синюю бумагу , если цена 1 листа одинаковая? (С объяснялками и полным ответом )
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Предмет:
Математика -
Автор:
caylen - 6 лет назад
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Автор:
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