Question

решите пж очень нужно ​

Answer 1

Ответ:

номер 1

1) {3х +y = 7

-5x + 2y = 3}

y = 7- 3x

-5x + 2 (7-3x) = 3

-5 x +14-6 x = 3

-5 x -6 x = 3 -14

-11 x = -11

x = 1.

3 x +y = 7

3•1+ y = 7

3+ y = 7

y = 7-3

y = 4

x= 1

y = 4