Question

a) 10 b) 12 c) 14 d) 16 e) 20

Answer 1

Resposta:

A

Explicação passo-a-passo:

$\dfrac{2x}{4x+10}=\dfrac{12}{30}$

$2x\cdot30=12\cdot(4x+10)$

$60x=48x+120$

$60x-48x=120$

$12x=120$

$x=\dfrac{120}{12}$

$x=10$

Letra A