Răspuns :
[tex]\it \dfrac{a-b}{b}=\dfrac{9}{4} \Rightarrow \dfrac{a-b+b}{b}=\dfrac{9+4}{4} \Rightarrow \dfrac{a}{b}=\dfrac{13}{4}[/tex]
Răspuns:
Explicație pas cu pas:
[tex]\bf \dfrac{a-b}{b}=\dfrac{9}{4} \Rightarrow 4\cdot(a-b)=9\cdot b \Rightarrow[/tex]
[tex]\bf 4a-4b=9b \Rightarrow 4a=9b+4b \Rightarrow4a=13b \Rightarrow\boxed{~\bf \dfrac{a}{b} =\dfrac{13}{4}~ }[/tex]