Question

a ) {2x+y=11
{3x -y = 9​

Answer 1

Ответ:

{2x+y=11

{3x -y = 9​

{y = 11 -2x

{3x- y = 9

3x - (11- 2x) = 9

x = 4

y = 11 - 2 * 4

y = 3

Ответ: (4, 3)