Предмет: Математика, автор: triniti2

Для букета выбрали белые и красные розы в соотношении 2:3. Сколько процентов роз в букете составляют красные розы?

Ответы

Автор ответа: бубуб

x % белые розы.

100-x % красные

б:к=2:3

x/(100-x)=2/3

3x=2(100-x)

3x=200-2x

5x=200

x=40% - белые

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