Odpowiedzi

2010-02-10T17:24:03+01:00
{3x+y=5
{2x-y=0
___________
3x+y+2x-y = 5

5x=5|| /5
x=1

x=1
3 + y =5

x=1
y= 5-3

x=1
y=2


{2x-y=5
{x+y=4
_______
2x-y+x+y =9
3x=9||/3
x=3

x=3
6-y=5

x=3
y=1

{-x-y=-6
{-x+y=4
_______
-x-y-x+y = -2

-2x=-2||/(-2)
x=1

x=1
-1-y=-6

x=1
y=-5