Question

daca a-b supra b =9 supra 4 atunci a supra b =​

Answer 1

$\it \dfrac{a-b}{b}=\dfrac{9}{4} \Rightarrow \dfrac{a-b+b}{b}=\dfrac{9+4}{4} \Rightarrow \dfrac{a}{b}=\dfrac{13}{4}$

Answer 2

Răspuns:

Explicație pas cu pas:

$\bf \dfrac{a-b}{b}=\dfrac{9}{4} \Rightarrow 4\cdot(a-b)=9\cdot b \Rightarrow$

$\bf 4a-4b=9b \Rightarrow 4a=9b+4b \Rightarrow4a=13b \Rightarrow\boxed{~\bf \dfrac{a}{b} =\dfrac{13}{4}~ }$