x=-5+y
2(-5+y)+1=-1
-10+2у+1=-1
-9+2у=-1
2у=-1+9
2y=8
y=4
x=-5+4=-1
ответ: х=1, у=4
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x=-5+y
2(-5+y)+1=-1
-10+2у+1=-1
-9+2у=-1
2у=-1+9
2y=8
y=4
x=-5+4=-1
ответ: х=1, у=4