Question

Aflati 3 numere , stiind ca doua cate doua au media aritmetica respectiv 7 , 10 , 11

Answer 1

(a+b):2=7
a+b=7 ori 4=14   a=b-14
(b+c):2=10
b+c=20               c=b-20
(a+c):2=11
a+c=22
b-14+b-20=22
b-14+b=22+20=42
2b=42+14=56
b=56:2=28
a=28-14=14
c=28-20=8

Sper ca te-am ajutat!