Задача 71795 2x-7y = -17 5x + y = 13...

64706925058a05274bb087eb

26.05.2023 11:09:53

2x-7y = -17

5x + y = 13

5f3ea7e3faf909182968ddd9

26.05.2023 11:18:28

★

{2x–7y = –17
{5x + y = 13 ( умножаем на 7)

{2x–7y = –17
{35x +7y = 91

{37x=74
{5x + y = 13

{x=2
{5*2+y=13

{x=2
{y=3