a+b+c=739________________________ __a=2b___________________________ __c=3b+13__________________________Inlocuim in:a+b+c=739_____________ __2b+b+3b+13=739_________________ __6b=739-13=726__________________ __6b=726=>b=726:6=121=>b=121_____ __=>a=2b=2•121=242=>a=242________ __=>c=3b+13=3•121+13=363+13=376__ _=>c=376