Question

(у+5/7)•1/3=2 целых 4/9

Answer 1

Пошаговое объяснение:
$(y + \frac{5}{7} ) * \frac{1}{3} = 2\frac{4}{9}$
$\frac{1}{3}y + \frac{5}{21} = \frac{22}{9}$
$\frac{1}{3}y = \frac{22}{9} - \frac{5}{21}$
$\frac{1}{3}y = \frac{139}{63}$
$y = \frac{139}{63} : \frac{1}{3}$
$y = \frac{139}{63} * \frac{3}{1} = \frac{139}{21}$