Предмет: Математика, автор: katrina1981a

Даю 60 балов!!!!!
Найти массу сплава цинка и меди, если отношение массы меди к массе цинка в сплаве равно 3:5 и меди на 2,4г меньше, чем цинка.
Через коэффициент пожалуйста решите


Аноним: хай

Ответы

Автор ответа: schoolmol
6
Х- коэффициент пропорциональности
3 х- меди
5 х- цинка
Условие меди на 2,4 меньше
5 х-3 х= 2,4
2х=2,4
Х= 2,4 : 2
Х= 1,2
1,2•3=3,6(г) меди
1,2 •5=6(г) цинка
3,6+6=9,6(г) масса сплава
Ответ: 9,6 г

katrina1981a: Это же через х или разницы нет?
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milenagasparyan567: 6п46взквнкчнзнчззчгазпгвщуф396йщуфнщцефзявнзявнзянвзявнряажряжржяв4ц70631406
Автор ответа: prettypushkova
5

3 : 5 - отношение массы меди к массе цинка.

Пусть х - коэффициент пропорциональности, тогда 3х г - масса меди, 5х г - масса цинка. Меди на 2,4 г меньше. Уравнение:

5х - 3х = 2,4

2х = 2,4

х = 2,4 : 2

х = 1,2

3х = 3 · 1,2 = 3,6 (г) - масса меди

5х = 5 · 1,2 = 6 (г) - масса цинка

3,6 + 6 = 9,6 (г) - масса сплава

Или так:

3х + 5х = 8х

8 · 1,2 = 9,6 (г) - масса сплава

Ответ: 9,6 г.


schoolmol: Спасибо за корону ❤️
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