Răspuns :
a+b+b=392
a=b-5
c=b+7
b-5+b+b+7=392
3b+2=392
3b=392-2
3b=390
b=390/3
b=130
a=130-5
a=125
c=130+7
c=137
a=b-5
c=b+7
b-5+b+b+7=392
3b+2=392
3b=392-2
3b=390
b=390/3
b=130
a=130-5
a=125
c=130+7
c=137
a+b+b=392
a=b-5
c=b+7
b-5+b+b+7=392
3b+2=392
3b=392-2
3b=390
b=390/3
=130
a=130-5
=125
c=130+7
=137
a=b-5
c=b+7
b-5+b+b+7=392
3b+2=392
3b=392-2
3b=390
b=390/3
=130
a=130-5
=125
c=130+7
=137