Question

ajuda por favor!!!!

Answer 1

$\dfrac{4}{12} = \dfrac{2}{x + 3}$

Multiplique cruzado

$4(x + 3) = 12 \times 2$

$4x + 12 = 24$

$4x = 24 - 12$

$4x = 12$

$x = \dfrac{12}{4}$

x=3