rozwiaz uklad rownan
{2x-y/2=2
2x+2y=-2
½(2x-y)=2|*2
2x-y=4|*2
4x-2y=8
---------------
2x+2y+4x-2y=-2+8
6x=6|:6
x=1
2*1+2y=-2
2+2y=-2
2y=-4|:2
y=-2
w załączniku
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2x+2y=-2
½(2x-y)=2|*2
2x+2y=-2
2x-y=4|*2
2x+2y=-2
4x-2y=8
---------------
2x+2y+4x-2y=-2+8
6x=6|:6
x=1
2x+2y=-2
2*1+2y=-2
2+2y=-2
2y=-4|:2
y=-2
w załączniku