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-6x+2y=9
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4x-6x= -10+9
-2x= -1/:(-2)
x=1/2
4x-2y= -10
4*1/2-2y= -10
2-2y= -10
-2y= -10-2
-2y= -12/:(-2)
y=6
x=1/2
y=6