Explicație pas cu pas:
(a+b):2=32/×2=> a+b=64
(b+c):2=39/×2=> b+c=78
(a+c):2=41/×2=> a+c=82⁰
-----------------(+)
2a+ab+2c=224/:2
a+b+c=112
64+c=112/-64 a+78=112/-78 b+82=112/-82
a=34 b=30 c=48
verificare
(a+b)/2=(30+34)/2=64/2=32
(a+c)/ 2=(30+48)/2=78/2=39
(b+c)/2=(34+48)/2=82/2=41
