Stiind ca a+b=14,b+c=48 si c+a=242 aflati (a+b+c)÷2 ​

Răspuns :

Răspuns:

a+2b+c=62

a+c=242 => 2b=62-242=-180 => b= -90

a=14+90=104

c=90+48=138

(a+b+c):2=76