Question

suma a 7 numere consecutiveeste 84

Answer 1

a-numarul
a+a+1+a+2+....+a+6=84
7xa+1+2+3...+6=84
=> 7xa+6x7:2=84
=> 7xa+21=84
=> 7xa=63
=> a=63:7
=> a=9
numerele sunt:9,10,11,12,13,14,15

Answer 2

a=a
b=a+1
c=a+2
d=a+3
e= a+4
f=a+5
g=a+6


a+a+1+a+2+a+3+a+4+a+5+a+6=84
a+a+a+a+a+a+a=84-1-2-3-4-5-6
7a=84-21
7a=63
a=63:7
a=9 (primul nr)
9+1=10 (al doilea)
9+2=11 (al treilea)
9+3=12 (al patrulea)
9+4=13 (al cincilea)
9+5=14 (al saselea)
9+6=15 (al saptelea)