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0,5x+1=y-2
x+y/2=3 / *2
0,5x=y-3 /*2
2x+y = 6
x= 2y-6
2y+2y-6=6
x=2y-6
4y = 12
x = 2y-6
y = 3
x = 2*3-6
y = 3
x = 0
Jest to układ oznaczony