3х+5у=16 (*2)
2х+3у=9 ( *-3)
6х+10у=32
-6х-9у=-27
у=5
2х+3*5=9
у=5
2х= -6
у=5
х= -3
(-3; 5)
.
9х-7у=95
4х+у=34
9х-7у=95
у=34-4х
9х-7(34-4х)=95
у=34-4х
9х+28х=95 +238
у=34-4х
37х=333
у=34-4х
х=9
у=34-4*9
х=9
у= - 2
(9; -2)
.
3х-5у=23 ( *2)
2х+3у=9 ( *-3)
6х-10у=46
-6х-9у= -27
-19у=19
2х+3у=9
у= -1
2х=9+3
у= -1
х=6
(6; -1)
.
6х+5у=0
2х+3у= -8 ( *-3)
6х+5у=0
-6х-9у=24
6х= -5у
-4у=24
6х= -5у
у= -6
6х= -5*(-6)
у= -6
х=5
у= -6
(5; -6)