Question

{2x+7y-44=0,

{2x-3y=-36;            способом сложения

Answer 1

      {2x+7y-44=0,

-1*{2x-3y=-36;

2х+7у-=44

-2х+3у=36

10у=80

у=80:10

у=8

2х+7*8=44

2х+56=44

2х=44-56

2х=-12

х=-6