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y-x=7/(-2)
2y+ 3x=-6
-2y+2x=-14
2y+ 3x= -6
5x= -20/5
x= -4
2y+(-12)= -6
2y= 6/2
y=3
spr. 2y+3x= -6
6+(-12)= -6
-6=-6