Question

a/2b + 3a/b =9 then find b=​

Answer 1

$\rm \dfrac{a}{2b} + \dfrac{3a}{b}=9$

$\rm \implies\dfrac{a}{2b}+\dfrac{6a}{2b} =9$

$\rm \implies\dfrac{a+6a}{2b}=9$

$\rm \implies\dfrac{7a}{2b}=9$

$\rm \implies 7a = 9 \times 2b$

$\rm \implies 7a = 18b$

$\rm \implies\dfrac{ 7a}{18} = b$

Hope it helps