Odpowiedzi

2009-05-18T17:10:51+02:00
A+a+1+a+2=84
3a=81/3
a=27

1:27 2:28 3:29
2009-05-18T17:11:31+02:00
X
x+1
x+2
3x + 3 = 84
3x = 81/3
x= 27
x+1 = 28
x+2 = 29
2009-05-18T17:11:56+02:00
X+x+1+x+2=84
3x+3=84 I-3
3x=84-3
3x=81
x=27
x+1=28
x+2=29