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x-y= - 1 (-2) multiplicamos por -2 al segundo
_______
2x-3y=5
-2x+2y=2
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-y=7
y= -7
x-y= - 1
x- (-7)= - 1
x+7= -1
x= -1-7
x= - 8
2x-3y=5
2(-8) - 3 (-7 )= 5
-16+21=5
5=5
los números son -7 y -8