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x-1=2(y+6)
x-1=2y+12
y=(x-13)/2
si x=3 , y=-5 y tu sigues
:)
X-1 = 2y+12
×= 2y+13
Entonces:
x-1= 2(y+6)
(2y+13) -1 = 2y + 12
2y +12 = 2y + 12
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