Răspuns :
a |------|-n-| = 70
b |----|-n-| =50 } 384
c |---------------|-n-| = 120
a+b+c = 384
a-n = 70
b-n=50
c-n=120
a+b+c-3n = 70+50+120
384-3n = 240
3n = 384-240
3n= 144
n = 48 timbre schimbate de fiecare
Cate timbre avea primul copil?
70+48= 118 timbre
Cate timbre avea al doilea copil?
50+48= 98 timbre
Cate timbre avea al treilea copil?
120+48 = 168 timbre
b |----|-n-| =50 } 384
c |---------------|-n-| = 120
a+b+c = 384
a-n = 70
b-n=50
c-n=120
a+b+c-3n = 70+50+120
384-3n = 240
3n = 384-240
3n= 144
n = 48 timbre schimbate de fiecare
Cate timbre avea primul copil?
70+48= 118 timbre
Cate timbre avea al doilea copil?
50+48= 98 timbre
Cate timbre avea al treilea copil?
120+48 = 168 timbre
I----------I 70 384-(70+50+120)=144
I----------I 50 144 : 3 = 48 (un segment = 48 )
I----------I 120