Odpowiedzi

2010-03-02T18:30:22+01:00
5x+20=80
5x=80-20
5x=60
x=60:5
x=12
1 5 1
2010-03-02T18:30:24+01:00
5x+20=80
5x = 80-20
5x = 60 / : 5
x = 12
1 3 1
2010-03-02T18:30:49+01:00
5x+20=80
5x=80-20
5x=60/:5
x=12

:)