ГДЗ Математика 5 класс Мерзляк. Задание 751

ОТВЕТЫ К ЗАДАНИЯМ

Решите уравнение:
1)

\frac{52}{63} - \frac{x}{63} = \frac{25}{63}

;

2)

\frac{x}{38} + \frac{14}{38} = \frac{23}{38}

;

3)

(\frac{12}{13} + x) - \frac{5}{13} = \frac{9}{13}

;

4)

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

\frac{52}{63} - \frac{x}{63} = \frac{25}{63}

- \frac{x}{63} = \frac{25}{63} - \frac{52}{63}

- \frac{x}{63} = - \frac{27}{63}

\frac{x}{63} = \frac{27}{63}

x =
27

\frac{x}{38} + \frac{14}{38} = \frac{23}{38}

\frac{x}{38} = \frac{23}{38} - \frac{14}{38}

\frac{x}{38} = \frac{9}{38}

x =
9

(\frac{12}{13} + x) - \frac{5}{13} = \frac{9}{13}

\frac{12}{13} + x - \frac{5}{13} = \frac{9}{13}

x = \frac{9}{13} + \frac{5}{13} - \frac{12}{13}

x = \frac{2}{13}

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

x - \frac{21}{31} + \frac{14}{31} = \frac{25}{31}

x = \frac{25}{31} + \frac{21}{31} - \frac{14}{31}

x = \frac{32}{31}