Question

3a+b supra 2a+7b =1pe 5 a supra b =?

Answer 1

Hey! Am ataşat rezolvarea :)

Answer 2

Salutare!

$\bf \dfrac{3a+b}{2a+7b}=\dfrac{1}{5}$

$\bf 5 \cdot(3a+b)=1\cdot(2a+7b)$

$\bf 15a+5b=2a+7b$

$\bf 15a-2a+5b=7b$

$\bf 13a=7b-5b$

$\bf 13a=2b$

$\boxed{\bf \dfrac{a}{b} =\dfrac{2}{13}}$

Bafta multa !!!