Ответ:
2x+y=8 -y=2x-8 -y=2x-8 y=16
2x-y=1 2x(2x-8)=1 4x-16x=1 -2x=1 x=-2
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Ответ:
2x+y=8 -y=2x-8 -y=2x-8 y=16
2x-y=1 2x(2x-8)=1 4x-16x=1 -2x=1 x=-2