Răspuns :
a+b+c=80
(a+b):2=12
(b+c):2=36
a+b=12x2
a+b=24
b+c=36x2
b+c=72
a+b+c=80
a+b=24
b+c=72
24+c=80
c=80-24
c=56
b+56=72
b=72-56
b=16
a+16=24
a=24-16
a=8
proba:8+16+56=24+56=80
(8+16):2=24:2=12
(16+56):2=72:2=36
(a+b):2=12
(b+c):2=36
a+b=12x2
a+b=24
b+c=36x2
b+c=72
a+b+c=80
a+b=24
b+c=72
24+c=80
c=80-24
c=56
b+56=72
b=72-56
b=16
a+16=24
a=24-16
a=8
proba:8+16+56=24+56=80
(8+16):2=24:2=12
(16+56):2=72:2=36
a+b+c=80
(a+b):2=12⇒a+b=24⇒c=80-24⇒c=56
(b+c):2=36⇒b+c=72⇒b=72-56⇒b=16⇒a=24-16=8
sper ca te-am ajutat
(a+b):2=12⇒a+b=24⇒c=80-24⇒c=56
(b+c):2=36⇒b+c=72⇒b=72-56⇒b=16⇒a=24-16=8
sper ca te-am ajutat