Odpowiedzi

2010-02-04T15:19:22+01:00
85 uczniów

6a - x-2
6b - x
6c - x+3

x-2 + x + x+3 = 85
3x = 85 +2-3
3x = 84
x = 28

6a - 28-2 = 26
6b - 28
6c - 28+3 = 31
2010-02-04T15:19:45+01:00
6a-x-2
6b-x
6c-x+3
razem- 85
(x-2)+x+(x+3)=85
x-2+x+x+3=85
3x+1=85 /-1
3x=84 /:3
x=28

6a- 28-2=26
6b- 28
6c- 28+3=31
spr: 26+28+31=85