Question

Não consigo resolver o j

Answer 1

$7 - \frac{3}{\frac{7}{3}}\\\\ 7 - \frac{3}{1}.\frac{3}{7}\\\\ 7- \frac{9}{7}\\\\ mmc(1,7) = 7\\ \frac{49 - 9}{7} = \frac{40}{7}$

Answer 2

Primeiro vamos calcular 3 ÷ 7/3:

3 ÷ 7/3 = 3 × 3/7 ⇒ 9/7

7 - 9/7 = mmc 7

49/7 - 9/7 = 40/7