(3х+3у=1. |*2
(2х-6у=-10
(6х+6у=2
_________
8х=-8
х= -1
__________
2*(-1)-6у=-10
-2-6у=-10
-6у=-10+2
-6у=-8
у= 8/6=4/3
ответ: (-1; 4/3).
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(3х+3у=1. |*2
(2х-6у=-10
(6х+6у=2
(2х-6у=-10
_________
8х=-8
х= -1
__________
2*(-1)-6у=-10
-2-6у=-10
-6у=-10+2
-6у=-8
у= 8/6=4/3
ответ: (-1; 4/3).