Question

помогите дам 60 балов

Answer 1

{х+у=3|•-2

{2x+2y=7

{-2х-2у=-6

{2х+2у=7

0х+0у=1

(х+у=5|•-2

(2х+2у=10

(-2х-2у=-10

(2х+2у=10

0х+0у=0