Question

Afla trei nr consecutive stiind ca suma ultimelor doua este triplul primului nr

Answer 1

3 nr x,y,z consecutive
x=x
y=x+1
z=x+2

y+z=3x
(x+1)+(x+2)=3x
x+1+x+2=3x
2x+3=3x
3=3x-2x
3=x

x=3
y=3+1=4
z=3+2=5

verificare
4+5=3*(3)

9=9