Rozwiąż układ równań
{-x-y=2
{2x+3y= -5
{-y=2+x
{2x=-5-3y
{2x=-5-3(2+x)
{y=-2-x
{2x=-5-6-3x
{2x+3x=-11
{5x=11|:5
{x=2 i 1/5
y=-2-2 i 1/5
y=-4 i 1/5
{-x-y=2 /·(-1)
x+y = -2
2x+3y= -5
x = -2-y
2(-2-y)+3x = -5
-4-2y+3y = -5
-2y+3y = -5+4
y = -1
x = -2-(-1)
x = -2+1
x = -1
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{-y=2+x
{2x=-5-3y
{-y=2+x
{2x=-5-3(2+x)
{y=-2-x
{2x=-5-6-3x
{y=-2-x
{2x+3x=-11
{y=-2-x
{5x=11|:5
{y=-2-x
{x=2 i 1/5
y=-2-2 i 1/5
y=-4 i 1/5
{-x-y=2 /·(-1)
{2x+3y= -5
x+y = -2
2x+3y= -5
x = -2-y
2(-2-y)+3x = -5
x = -2-y
-4-2y+3y = -5
x = -2-y
-2y+3y = -5+4
x = -2-y
y = -1
x = -2-(-1)
y = -1
x = -2+1
y = -1
x = -1
y = -1