Предмет: Математика, автор: смертjk

купили 1,2кг конфет и 0,8кг печенья за всю покупку заплатили 5,96 рублей. известно,что 1 кг конфет дороже 1кг печенья на 1,3 рубля сколько стоит 1 кг конфет

Ответы

Автор ответа: Yulia3237

конфет - 1.2 кг
печенья - 0.8 кг
Всего - 5.96
х - 1 кг. печенья
1,2(х + 1,3) + 0,8х = 5,96
1,2х + 1,56 + 0,8х = 5,96
1,2х + 0,8х = 5,96 - 1,56
2х = 4,4
х = 4,4 : 2
х = 2,2
Значит 1 кг печенья стоит 2,2 руб., тогда 1 кг конфет стоит 2,2 + 1,3 = 3,5 руб.
Ответ: 3,5 рублей.

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