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(-3)2x-4=4
6x-8y=2
-6x+12=-12
6x-8y=2
-6x+0y=-24
(estos dos ecuaciones se suman y queda así)
0x-8y=-22
y=22/8---11/4
se reemplaza en x
3x-4(11/4)=1
3x-44/4=1
3x-11=1
3x=12
x=4