Предмет: Алгебра, автор: ПростоЧувак1

если цена книги понизилась на 15% и стала равной 680 тенге тогда первоначальная цена книги была

Ответы

Автор ответа: ann1885

1

100%-15%=85% - 680
680/85 * 100=800
ответ 800

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