rozwiąż układy równań {2x+y=6 {x+y=4
{2x +y=6 x+y=4 /*(-1)
{2x+y=6 -x-y=-4
______________
x=2
{2x+y=6 x+y=4/*2
{2x+y=6 2x+2y=8 /* (-1)
{2x+y=6 -2x-2y=-8
_______________
-y= -2 /* (-1)
y=2
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{2x +y=6 x+y=4 /*(-1)
{2x+y=6 -x-y=-4
______________
x=2
{2x+y=6 x+y=4/*2
{2x+y=6 2x+2y=8 /* (-1)
{2x+y=6 -2x-2y=-8
_______________
-y= -2 /* (-1)
y=2