Предмет: Алгебра, автор: AliceYoung

После двух последовательных снижений цены на 20 процентов шкаф стал стоить 1600 грн.Какой была начальная стоимость шкафа?
помогите! 9 класс

Ответы

Автор ответа: OLEГ123

Значит стоимость шкафа 80%
Посчитаем пропорцией
1600-80%
х-100% х= 1600*100/80=2000 (грн) стоимость до 1-ого снижения
........................................................................................................................
2000-80%
х-100% х= 2000*100/80=2500 (грн) стоимость до 2-го снижения
Ответ: 2500 грн

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После двух последовательных снижений цены на 20 процентов шкаф стал стоить 1600 грн.Какой была начальная стоимость шкафа?
помогите! 9 класс