Question

7/9 : a/b = 3/5 + 4

tim a / b

Answer 1

\(\dfrac{7}{9}:\dfrac{a}{b}=\dfrac{3}{5}+4\)

\(\Rightarrow\dfrac{7}{9}:\dfrac{a}{b}=\dfrac{23}{5}\)

\(\Rightarrow\dfrac{a}{b}=\dfrac{7}{9}:\dfrac{23}{5}\)

\(\Rightarrow\dfrac{a}{b}=\dfrac{35}{207}\)

Answer 2

`7/9:a/b=3/5+4`

`7/9:a/b=3/5+20/5`

`7/9:a/b=23/5`

`a/b=7/9:23/5`

`a/b=7/9xx5/23`

`a/b=35/207`

Answer 3

`7/9 : a/b = 3/5+ 4`

`=> 7/9 xx b/a = 23/5`

`=>            b/a = 23/5 : 7/9`

`=>            b/a  = 207/35`

Vậy `a/b = 35/207`

Answer 4

<=>

\(\dfrac{7}{9}:\dfrac{a}{b}=\dfrac{3}{5}+4=\dfrac{23}{5}\)

<=>

\(\dfrac{a}{b}=\dfrac{7}{9}:\dfrac{23}{5}=\dfrac{35}{207}\)