Question

Помогите пожалуйста очень надо

Answer 1

Ответ:

$1) \frac{4}{15} + x = \frac{11}{15 } \\ x = \frac{11}{15} - \frac{4}{15} = \frac{7}{15} \\ 2) \frac{16}{21} - x = \frac{9}{21} \\ x = \frac{16}{21} - \frac{9}{21} = \frac{7}{21} = \frac{1}{3}$

$3)x - \frac{4}{35} = \frac{12}{35} \\ x = \frac{4}{35} + \frac{12}{35} = \frac{16}{35}$

$4)(x - \frac{21}{31} ) + \frac{14}{31} = \frac{25}{31} \\ x = \frac{25}{31} - \frac{14}{31} + \frac{21}{31} = \frac{32}{31}$