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5x + 2y = 1 klamra
-6x-2y=0
5x=2y=1 klamra i dodajemy gore i dol
-1x=1 /*(-1)
x= -1
3x + y =0
3*(-1) + y =0
-3+y=0
y=3
x= -1
y= 3 klamra