Question

математика 6 класс.
решение​

Answer 1

Ответ:

$( \frac{7}{8} - \frac{1}{9} x) \times 72 = 7$

$\frac{7}{8} - \frac{1}{9} x = \frac{7}{72}$

$\frac{1}{9} x = \frac{7}{8} - \frac{7}{72}$

$\frac{1}{9} x = \frac{63}{72} - \frac{7}{72}$

$\frac{1}{9} x = \frac{56}{72}$

$x = \frac{56}{72} \div \frac{1}{9}$

$x = \frac{56}{72} \times \frac{9}{1}$

$x = 7$