Ответ:
x-y=1
x=1+y
x+y=7
1+y+y=7
2y=6
y=3 x=1+3=4 (4;3)
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Ответ:
x-y=1
x=1+y
x+y=7
1+y+y=7
2y=6
y=3 x=1+3=4 (4;3)