Răspuns :
a+b+c=739
a=2b
c=13+3b
2b+b+13+3b=739
6b=739-13
b=626÷6
b=121
a=2b
a=2×121
a=242
121+242+c=739
c=739-242-121
c=376
a=2b
c=13+3b
2b+b+13+3b=739
6b=739-13
b=626÷6
b=121
a=2b
a=2×121
a=242
121+242+c=739
c=739-242-121
c=376