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Klamra
2x+y=7/*2
3x-2y=0
Klamra
4x+2y=14
3x-2y=14
--------------- +
7x=28/:7
x=4
8+y=7
y=7-8
Klamra
y=-1
x=4
2.
Klamra
3x+y=13
2x-y=7
------------- +
5x=20/:5
x=4
8-y=7
-y=-1
Klamra
y=1
x=4