Odpowiedzi

2010-03-26T14:44:20+01:00
1/2x+1/3y=6 \ * 6
2/3x-1/3y=1 /6

3x + 2y = 36
4x - 2y = 6

7x = 42

x=6
18+2y = 36

x=6
2y=36-18

x=6
2y=18

x=6
y=9