Помогите!!!!!!!!Срочно!!!!!!!!

Question

Помогите!!!!!!!!Срочно!!!!!!!!

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Answer 1

{3-(х-2у)-4у=18
{2х-3у+3=2(3х-у)

]3-х+2у-4у-18=0
{2х-3у+3-6х+2у=0

{-2у-х-15=0
{-4х-у+3=0

{2у+х=-15
{4х+у=3

{х=-2у-15
{4(-2у-15)+у-3=0

4(-2у-15)+у-3=0
-8у-60+у-3=0
-7у-63=0
7у=-63
у=-9

х=-2·(-9)-15=-18-15=-33

Ответ:(-33;-9)