Question

resolva 3/7-[2/7:1/5]

Answer 1

3  -  [2  : 1] =
7      7    5

3 - [2 x 5] =
7    7    1

3 - 10 =
7    7
- 7  =
  7
- 1
Resposta: - 1

Answer 2

$\frac{3}{7} - ( \frac{ \frac{2}{7} }{ \frac{1}{5} } )$

$\frac{3}{7} -( \frac{2}{7}. \frac{5}{1} )$

$\boxed{ \boxed{\frac{3}{7} - \frac{10}{7} = -\frac{7}{7} =-1}}$