rozwiąż układ równan metoda podstawiania :
y+2-(3-x)=0
x-2=5-(2-y)
PILNE!!!!!!!!!!!!!!!!
{y+2-(3-x)=0
{x-2=5-(2-y)
{y+2-3+x=0
{x-2=5-2+y
{y-1+x=0
{x-2=3+y
{y+x=1
{x-y=5
x=5+y(z drugiego równana)
y+5+y=1
2y=1-5
2y=-4|:2
y=-2
_____
x=5+(-2)
x=3
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{y+2-(3-x)=0
{x-2=5-(2-y)
{y+2-3+x=0
{x-2=5-2+y
{y-1+x=0
{x-2=3+y
{y+x=1
{x-y=5
x=5+y(z drugiego równana)
y+5+y=1
2y=1-5
2y=-4|:2
y=-2
_____
x=5+(-2)
x=3