Rozwiąż układ równań metodą graficzną
2x-y=-4
x+y=1
{2x-y=-4
{x+y=1
2x+x=-4+1
3x=-3 / 3
x =-1
{x=-1
{-1 +y =1
{y=1+1
{y=2
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{2x-y=-4
{x+y=1
2x+x=-4+1
3x=-3 / 3
x =-1
{x=-1
{-1 +y =1
{x=-1
{y=1+1
{x=-1
{y=2