Question

{7x−3y=2,
{-2x+2y=20

Відповідь: x=
;y=

Answer 1

7x - 3y = 2

-2x + 2y = 20

7x - 3y = 2

2y =2x + 20

7x - 3y = 2

y = x + 10

7x - 3(x + 10) = 2

7x - 3x - 30 = 2

4x = 32

x = 8

y = 8 + 10

y = 18

Ответ: (8; 18)