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Se stie ca ab-ac =135 si a=9 . Aflati b-c

Răspuns :

a (b-c)=135<=>9(b-c)=135=>b-c=15
[tex]ab-ac=135 \\ a=9 \\ b-c=? \\ ab-ac=135 \\ a(b-c)=135 \\ 9(b-c)=135 \\ b-c=135:9 \\ \boxed{b-c=15}[/tex]