Răspuns :
daca b=c
facem inlocuirea => b+b-2a=8
daca b=2a, atunci -b=-2a =>
din nou facem inlocuiri
b+b-b=8 =>
b=8 =>
daca b=c atcunci c=8
daca b=2a => a=b/2
deci a=8/2=4
facem inlocuirea => b+b-2a=8
daca b=2a, atunci -b=-2a =>
din nou facem inlocuiri
b+b-b=8 =>
b=8 =>
daca b=c atcunci c=8
daca b=2a => a=b/2
deci a=8/2=4
daca b=c si b=2a atunci c=2a
b+c-2a=2a+2a-2a=2a
deci 2a=8
a=4
daca 2a=b,c
atunci b=8 si c=8
abc cu bara deasupra=488
b+c-2a=2a+2a-2a=2a
deci 2a=8
a=4
daca 2a=b,c
atunci b=8 si c=8
abc cu bara deasupra=488