Odpowiedzi

2009-12-02T16:24:06+01:00
X+2y=9
-x-3y=16
-------------
0x-y=25
-y=25 /:(-1)
y=-25

x+2*(-25)=9
x=9+50
x=59

x=59
y=-25
2009-12-02T16:24:08+01:00
X+2y=9
-x-3y=16

-x+x+2y-3y=9+16

-y=25
y=-25

x+2*(-25)=9
x-50=9
x=59
2009-12-02T16:24:15+01:00
{x+2y=9
{-x-3y=16

{5y = 25 /:5
{y= 5

----------------
{y = 5
{x+2y = 9

{y = 5
{x = 9 - 10

{y = 5
{x= - 1