Odpowiedzi

2010-02-26T19:03:54+01:00
5y-x=3
x=3-y

5y-x=3
x+y=3

-x+5y=3
x+y=3

6y=6 |6
y=1

x=3-y
x=3-1
x=2


Mam nadzieję,że o to chodziło;)
2010-02-26T19:04:14+01:00
{5y-x=3
{x=3-y

{-x+5y=3
+{x+y=3
______________

6y=6 |:6
y=1

x+y=3
x+1=3
x=3-1
x=2

{x=2
{y=1

2010-02-26T19:04:48+01:00
5y-x=3
x=3-y

5y-3-y=3
5y-y=3+3
4y=6/:4
y=1,5

x=3- 1,5
x=1,5