Question

Determine o valor de x​

Answer 1

Caso esteja pelo app, e tenha problemas para visualizar esta resposta, experimente abrir pelo navegador https://brainly.com.br/tarefa/38606802

                                                     

$\underline{\rm observe~a~figura~que~anexei.}\\\boxed{\begin{array}{l}\sf\dfrac{25}{20-y}=\dfrac{20\div5}{15\div5}\\\sf\dfrac{25}{20-y}=\dfrac{4}{3}\\\sf 80-4y=75\\\sf 4y=80-75\\\sf 4y=5\\\sf y=\dfrac{5}{4}\end{array}}$

$\boxed{\begin{array}{l}\sf\dfrac{x}{15}=\dfrac{25}{20-y}\\\sf\dfrac{x}{15}=\dfrac{25}{20-\dfrac{5}{4}}\\\sf 20x-\dfrac{5}{4}x=375\\\sf 80x-5x=15000\\\sf75x=15000 \\\sf x=\dfrac{15000}{75}\\\sf x=20\end{array}}\blue{\checkmark}$