Предмет: Алгебра, автор: volkovbogdan1982

Сумма чисел дорівнює 75 Знайдіть ці числа якщо 70% від одного і 40% від другого разом складають 42

Ответы

Автор ответа: liza05030

1

Ответ:

Система :

а+в=75;

0,7а+0,4в=42.

Звідси:

а=40

в=35

Объяснение:

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