Question

{2х+5у=320
{3х-2у=100
СРОЧНО ПЖ ДАЮ 20​

Answer 1

{2х+5у=320 |*3

{3х-2у=100. |*(-2)

{6х+15у=960 19у=760

{-6х+4у=-200. у=40

{2х+5*40=320

{у=40

{2х+200=320

{у=40.

{х=60

{у=40