Răspuns :
[tex]a-b=25\\
a=6b\\
=\ \textgreater \ 6b-b=25=\ \textgreater \ 5b=25=\ \textgreater \ b=25:5=\ \textgreater \ b=5\\
a=6b\ \textless \ =\ \textgreater \ a=6*5=\ \textgreater \ a=30\\\\
Balaurul~are~5~ani~si~ma-sa~are~30~ani\\\\
Proba:30-5=25\\
6*5=30\\
(corect)
[/tex]