Răspuns :
a+b+c=519
b=a+1
c=a+2
Inlocuim
a+a+1+a+2=519
3a+3=519
3a=519-3
3a=516
a=516:3
a=172
b=a+1=172+1=173
c=a+2=172+2=174
v: 172+173+174=519
b=a+1
c=a+2
Inlocuim
a+a+1+a+2=519
3a+3=519
3a=519-3
3a=516
a=516:3
a=172
b=a+1=172+1=173
c=a+2=172+2=174
v: 172+173+174=519