Question

por favor alguém poderia fazer a conta e já fiz 3 vezes n consegui achar o resultado

Answer 1

Resposta:

E = 2/5  + (21/4 * 8/7)/ (3/4 -1/3)

E = 2/5  + (21/4 * 8/7)/ (9/12 -4/12)

E = 2/5  + (21/4 * 8/7)/ (5/12)

E = 2/5  + (21/4 * 8/7)* (12/5)

E = 2/5  + (21/1 * 8/7)* (3/5)

E = 2/5  + (3/1 * 8/1)* (3/5)

E = 2/5  + (3*3*8/5)

E = 2/5  + (72/5)  = (2+72)/5 =74/5

Letra E

Answer 2

Resposta: e

$\dfrac{2}{5}+\dfrac{\dfrac{21}{4}*\dfrac{8}{7}}{\dfrac{3}{4}-\dfrac{1}{3}}\\\\\\\dfrac{2}{5}+\dfrac{\dfrac{168}{28}}{\dfrac{9-4}{12}}\\\\\\\dfrac{2}{5}+\dfrac{6}{\dfrac{5}{12}}\\\\\dfrac{2}{5}+(6*\dfrac{12}{5})\\\\\dfrac{2}{5}+\dfrac{72}{5}\\\\\dfrac{2+72}{5}=\boxed{\dfrac{74}{5}}$

Explicação passo-a-passo: