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-6 -12y -8y= 10
x= -2 - 4y
y= -0,8
x=1,2
x=-0,8
b)x=3+2y
-6-4y+y= 0
x=3+2y
y= -2
x= -1
y= -2
c) y= 9- 2x
5x- 36+ 8x=3
y=9- 2x
x=3
y=3
x3