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x-2=5-(2-y)
y+2-3+x=0
x-2=5-2+y
x+y=1
x-y=5
2x=6
x=3
3+y=1
y=-2
x-2=5-(2-y)
y+2-3+x=0
x-2=5-2+y
y+x=-2+3
x-y=5-2+2
y+x=1
-y+x=5
(pozioma kreska)
2x=6 /:2
x=3
y+3=1
y=1-3
y=-2
x=3
x-2=5-(2-y)
y+2-3+x=0
x-2=5-2+y
y+x=1
-y+x=1
_______________
2x=2 |/2
y+x=1
x=2
y+2=1
x=2
y=-1