[tex] \frac{2a+7}{3b+2} = \frac{7}{2}~atunci~ \frac{a}{b}=? \\ \\ \frac{2a+7}{3b+2}= \frac{7}{2}=\ \textgreater \ (2a+7)2=7(3b+2)=\ \textgreater \ 4a+14=21b+14 \\ \\ 4a=21b=\ \textgreater \ a= \frac{21b}{4}~deci~ \frac{a}{b}= \frac{ \frac{21b}{4} }{b} = \frac{21}{4} [/tex]
