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x=-8y/9
6x+12y=15
x=15-12y/6
-8y/9=15-12y/6
6(-8y)=9(15-12y)
-48y=135-108y
-48y+108y=135
60y=135
y=9/4 x=-8(9/4)/9 x=-2 reemplazas 9(-2)+8(9/4)=0 -18+72/4=0
-72+72=0