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Aflați numărul. abc , ştiind ca : abc2-2abc=3051



Răspuns :

[tex]\overline{abc2}-\overline{2abc}=3051\\ 10\cdot \overline{abc}+2-2000-\overline{abc}=3051\\ 9\cdot \overline{abc}=5049\\ \boxed{\overline{abc}=561}[/tex]