a+b=93
b+c=115
c+a=100
a+b+b+c+c+a= 93+115+100
2a+2b+2c=308
2(a+b+c)=308/:2
a+b+c=154
unde inlocuim a+b:
93 + c = 154/-93
c= 61
acum inlocuim in relatia :
b + 61 = 115/-61
b= 54
şi:
61+a=100/-61
a= 39
Verificare: 39+61+54= 154
nu stiu cat de corect este, am incercat !