Question

6 2/7- 3 5/7- x =1 1/7

Answer 1

вот ответ)))) вроде бы так))

Answer 2

$6 \times \frac{2}{7} - 3 \times \frac{5}{7} - x = \frac{11}{7}$
$\frac{44}{7} - \frac{26}{7} - x = \frac{11}{7}$
$44 - 26 - 7x = 11$
$- 7x = 11 -18$
$- 7x = -7$
$x = 1$