Ответ: x=4; y= -1
Объяснение:
x+y=3;
x-y=1;
x=3-y;
3-y-y=1;
-2y=2;
y=-1;
x+(-1)=3;
x-1=3;
x=4.
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Ответ: x=4; y= -1
Объяснение:
x+y=3;
x-y=1;
x=3-y;
3-y-y=1;
-2y=2;
y=-1;
x+(-1)=3;
x-1=3;
x=4.