Question

Со 495. Решите уравнения:
9
1) х - 3
13
+ 51
10-12
9
9
2) 3
- y + 4
16
16
13
13
16
) x
3) 13 14 (х-2) – 30 т. 4) (-2) 4-4,​

Answer 1

Переводим смешанные дроби в неправильные:

1) (x - \frac{48}{13}) + \frac{75}{13} = \frac{160}{13}

(x - \frac{48}{13}) = \frac{160}{13} - \frac{75}{13}

(x-\frac{48}{13}) = \frac{85}{13}

x = \frac{85}{13} + \frac{48}{13}

x = \frac{133}{13}

2) (\frac{57}{16} - y) + \frac{73}{16} = \frac{87}{16}

(\frac{57}{16} - y) = \frac{87}{16} - \frac{73}{16}

(\frac{57}{16} - y) = \frac{14}{16}

y = \frac{14}{16} + \frac{57}{16}

y = \frac{71}{16}

y = 4,4375

3) \frac{367}{27} + (x-\frac{71}{27}) = \frac{815}{27}

(x-\frac{71}{27}) = \frac{815}{27} - \frac{367}{27}

(x-\frac{71}{27}) = \frac{448}{27}

x = \frac{448}{27} + \frac{71}{27}

x = \frac{519}{27}

4) (y - \frac{54}{25}) + \frac{107}{25} = \frac{356}{25}

(y - \frac{54}{25}) = \frac{356}{25} - \frac{107}{25}

(y-\frac{54}{25}) = \frac{249}{25}

y = \frac{249}{25} + \frac{54}{25}

y = \frac{303}{25}

y = 12,12

Пошаговое объяснение: