Question

Aflati numerele a,b,c care verifica simultant egalitatile ;a+b=34 ,b+c =43 ,c+a=55

Answer 1

a + b = 34
b + c = 43
c + a = 55
le adunam
2(a + b + c) = 132
a + b + c = 132 : 2
a + b + c = 66
34 + c = 66
c = 66 - 34
c = 32
a + 43 = 66
a = 66 - 43
a = 23
23 + b + 32 = 66
b = 66 - 55
b = 11