rozwiaz układ równan :
2x+y=5
y=x+2 połaczone jest to klamra
2x + y =5
y = x+2 -----------------> y = 1+2
y = 3
2x + x+2 = 5
3x = 3 /:3
x = 1
{x=1
{y=3
{2x+y=5
{y=x+2
{-x+y=2 /*2
{-2x+2y=4
_________
3y=9 /:3
y=3
2x+3=5
2x=5-3
2x=2 /:2
x=1
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2x + y =5
y = x+2 -----------------> y = 1+2
y = 3
2x + x+2 = 5
3x = 3 /:3
x = 1
{x=1
{y=3
{2x+y=5
{y=x+2
{2x+y=5
{-x+y=2 /*2
{2x+y=5
{-2x+2y=4
_________
3y=9 /:3
y=3
2x+3=5
2x=5-3
2x=2 /:2
x=1
y=3
x=1