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X+Y=1.000
X-Y=868
X=?
Y=?


Răspuns :

X+Y=1000
X-Y=868
adunam cele 2 relatii
2X=1868 |:2
X=934
Y=1000-934=66
x /----/+868
y /----/

1000-868=132
132/2=66

x=66+868=934
y=66