Răspuns :
83 * 7 = 581 ( al ll - lea nr )
581 + 83 = 664
2480 - 664 = 1816 ( al lll - lea nr )
581 + 83 = 664
2480 - 664 = 1816 ( al lll - lea nr )
[tex]a+b+c=2480=\ \textgreater \ [/tex]
[tex]83+(a*7)+c=2480=\ \textgreater \ [/tex]
[tex]83+83*7+c=2480=\ \textgreater \ [/tex]
[tex]83+581+c=2480=\ \textgreater \ [/tex]
[tex]664+c=2480=\ \textgreater \ [/tex]
[tex]c=2480-664=\ \textgreater \ [/tex]
[tex]c=1816[/tex]
[tex]a=83[/tex]
[tex]b=83*7=581[/tex]
[tex]c=83+581=664=\ \textgreater \ 2480-664=1816[/tex]
[tex]Verificare=\ \textgreater \ 83+581+1816=2840[/tex]
[tex]83+(a*7)+c=2480=\ \textgreater \ [/tex]
[tex]83+83*7+c=2480=\ \textgreater \ [/tex]
[tex]83+581+c=2480=\ \textgreater \ [/tex]
[tex]664+c=2480=\ \textgreater \ [/tex]
[tex]c=2480-664=\ \textgreater \ [/tex]
[tex]c=1816[/tex]
[tex]a=83[/tex]
[tex]b=83*7=581[/tex]
[tex]c=83+581=664=\ \textgreater \ 2480-664=1816[/tex]
[tex]Verificare=\ \textgreater \ 83+581+1816=2840[/tex]