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Buna ziua va rog frumos repede ex 3 detaliat
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Buna Ziua Va Rog Frumos Repede Ex 3 Detaliat class=

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[tex]ab-ba=a\\\\10a+b-(10b+a)=a\\\\10a+b-10b-a=a\\\\9a-9b=a\\\\9(a-b)=a= > a=9\\\\b=8\\ \\98-89=9\\\\nr.ab=98[/tex]