Question

Ma a cinci numere naturale consecutive este 12, aflați numerele

Answer 1

a+b+c+d+e=12
a+a+1+a+2+a+3+a+4=12
5a+10=12
5a=2
a=0,4
b=1,4
c=2,4
d=3,4
e=4,4

Answer 2

I nr = x 
II nr = x+1
III nr = x+2
IV nr = x+3
V nr = x+4

( x+x+1+x+2+x+3+x+4) : 5 = 12 
5x +10 = 12 x 5 
5x + 10 = 60 
5x = 60 - 10 
5x = 50 
x = 50:5 
x = 10 

numerele consecutive sunt:  10, 11, 12, 13, 14,