Question

13. Решите уравнение: a) 0,48 - (x – 3,08) = -6,324;
в) -5,9х – 5,21 = 9,54;

6) (x + 29,93):(-5,09) = -7,2;
г) – 1,3 : х = 0,26 :(-0,22).​

Answer 1

1) 0,48-(x-3,08)=-6,324

Пошаговое объяснение:

0,48-х+3,08=-6,324

3,56-х=-6,324

-х=-6,324-3,56

-х=-9,884

2)-5,9х-5,21=9,54

-5,9х=9,54+5,21

-5,9х=14,75

Х=-25

3)(х+29,93):(-5,09)=-7,2

$(x + \frac{2993}{100} ) \div ( - 5.09) = - 7.2$

$(x + \frac{2993}{100} ) \div ( - \frac{509}{100} ) = - 7.2$

$(x + \frac{2993}{100} ) \div ( - \frac{509}{100} ) = - \frac{36}{5}$

$- \frac{100}{509} x - \frac{2993}{509} = - \frac{36}{5}$

$- 500x - 14965 = - 18324$

$- 500x = - 18324 + 14965$

$- 500x = - 3359$

$x = \frac{3359}{500}$

4)-1,3:х=0,26:(-0,22)

-1,3:х=0,26:(-0,22),х≠0

$\frac{50}{13} \times 0.286 = x$

$\frac{50}{13} \times \frac{143}{500} = x$

$50 \times \frac{11}{500} = x$

$\frac{11}{10} = x$

х=11/10,х≠0

$x = \frac{11}{10}$