Решите систему уравнений,используя метод подстановки
{2x+y=11
{3x-y=4
1 Смотреть ответ Dимасuk Dимасuk У = 11 - 2х
у = 3х - 4

11 - 2х = 3х - 4
у = 3х - 4

15 = 5х
у = 3х - 4

х = 5
у = 3•5 - 4

х = 5
у = 11
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