Question

$\frac{a}{a+6} = \frac{2}{5}$ ajuda pfvr

Answer 1

Resposta:

$a=4$

Explicação passo-a-passo:

$\frac{a}{a+6}=\frac{2}{5}$

$2(a+6)=5a\\2a+12-5a=0\\2a-5a=-12\\-3a=-12\\a=\dfrac{-12}{-3}\\a=4$