Предмет: Математика, автор: mrrstlin

Реши задачу с помощью уравнения.

Коллекция минералов состоит из яшмы,кварца и малахита. В ней 80 образцов минералов. В коллекции 17 образцов яшмы, а образцов кварца в 6 раз больше, чем малахита. Сколько образцов малахита в коллекции?

Ответы

Автор ответа: ЛенаB3

0

Яшмы-17
Малахита-х
Кварца-6х
Всего 80
17+х+6х=80
17+7х=80
7х=80-17
7х=63
х=63÷7
х=9
9 образцов малахита
Ответ:9 образцов малахита в коллекции

Автор ответа: mrrstlin

0

а почему 7x а не 6

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