Предмет: Алгебра, автор: jongkrqnk

{X-y=2;
2x+y=7 Срочнооо

Ответы

Автор ответа: Zazzzka

Ответ:

{x-y =-2

y= 7 - 2x

x -(7 - 2x) =2

x =3

y = 7 - 2*3

y =1

(x , y) =(3,1)

{ 3-1=2

2*3+1=7

{2=2

7=7

(x , y) =(3,1)

Объяснение:

jongkrqnk: А можно еще и способом додавання?

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{X-y=2; 2x+y=7 Срочнооо

Ответы

{X-y=2;
2x+y=7 Срочнооо