Odpowiedzi

2009-11-17T16:35:34+01:00
6x+y=8
-6x+4y=2

5y = 10 /:5
y= 2

6x+y=8
6x + 2 = 8
6x = 6 / : 6
x=1
2009-11-17T16:35:45+01:00
5y=10 /:5
y=2

teraz podstaw po y:

6x+2=8
6x=8-2
6x=6 /:6
x=1
2009-11-17T16:37:48+01:00
6x+y=8
+ -6x+4y=2
------------------------
5y = 10 / 5 (obustronnie)
y = 2
6x +2 = 8
y = 2
6x = 6/ 6
y = 2
x = 1