Question

(х-3 13/21)+2 10/21=7 2/21

1 5/7*х-5/9=2 4/9

Answer 1

Ответ:

Пошаговое объяснение:

(х-3 13/21)+2 10/21=7 2/21

Х=7 2/21+3 13/21-2 10/21

Х=8 5/21

1 5/7*х-5/9=2 4/9

1 5/7х=2 4/9+5/9

1 5/7х=3

Х=3:1 5/7=3*7/12

Х=7/4=1 3/4

Answer 2

1.

$(x - \frac{13}{7} ) + \frac{20}{21} = \frac{2}{3} \\ x - \frac{13}{7} + \frac{20}{21} = \frac{2}{3} \\ x = \frac{2}{3} + \frac{19}{21} \\ x = \frac{11}{7} = 1 \frac{4}{7}$

2.

$\frac{25}{65} x = \frac{8}{9} \\ x = \frac{56}{25} = 2 \frac{6}{25}$