Question

Помогите!!))))))))) б)

Answer 1

$3 times frac{2}{7} - (8 times frac{1}{9} - 2 times frac{5}{7} ) =3 times frac{2}{7} - (8 times frac{7}{63} - 2 times frac{45}{63} ) = 3 times frac{2}{7} - 5 times frac{25}{63} = 3 times frac{18}{63} - 5 times frac{25}{63} = - 2 times frac{7}{63} = - 2 times frac{1}{9}$