Предмет: Алгебра, автор: onetreizz

Помогите плиз, срочноооо

Приложения:

Ответы

Автор ответа: iramazurk
0

Ответ:

(-1,5; 4)

Объяснение:

{4х + 3у = 6 | * 5

{6х - 5у = -29 | * 3

{20х + 15у = 30

{18х - 15у = -87

{38х = -57

{20х + 15у = 30

1)

38х = -57

х = -57 : 38

х = -1,5

2)

20х + 15у = 30

20 * (-1,5) + 15у = 30

-30 + 15у = 30

15у = 30 - (-30)

15у = 30 + 30

15у = 60

у = 60 : 15

у = 4

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