Question

ajuda por favor (é pra hoje) ​

Answer 1

Resposta:

$\Large \frac{4 \div 4}{12 \div 4} = \frac{x}{21} \\ \\ \Large \frac{1}{3} = \frac{x}{21} \\ \\ \Large \: 3x = 21 \times 1 \\ \\ \Large x = \dfrac{21}{3} \\ \\ \Large \boxed{ \green{x = 7}}$

$\Large \boxed{\underline{\bf \blue{Bons\: Estudos!}}}\\ \\\Large \boxed{\underline{\bf 28/05/2021}}$