a fost răspuns

DAca [tex] \frac{a}{b} [/tex]=[tex] \frac{2}{7} [/tex] determinati [tex] \frac{2a+b}{5a+2b} [/tex] Repede va roggg!!!!!!!!!!

Răspuns :

a=2b/7 si se inlocuieste in fractia ce trebuie calculata
[tex]\dfrac{2a+b}{5a+2b}=\dfrac{2\cdot\dfrac{2b}{7}+b}{5\cdot\dfrac{2b}{7}+2b}=\dfrac{\dfrac{11b}{7}}{\dfrac{24b}{7}}=\dfrac{11}{24}[/tex]