👤

afla trei nr consecutive, stiind ca suma lor este 15

Răspuns :

a+b+c=15
b=a+1
c=b+1=a+2
a+a+1+a+2=15
3a+3=15
3a=15-3
3a=12
a=4

b=a+1
b=4+1
b=5

c=b+1
c=5+1
c=6

Succes!
4,5,6=15.ș...............................