Решите уравнение:
1) −5x = 30;
2) −0,8x = −5,6;
3) −7x = 4;
4) −6x = −8;
5) $\frac{2}{3}x = -\frac{3}{8}$;
6) 40,5 : x = −9;
7) $-\frac{32}{63} : x = \frac{8}{21}$;
8) $x : \frac{2}{7} = -1,4$.
−5x = 30
x = 30 : (−5)
x = −6
−0,8x = −5,6
x = −5,6 : (−0,8)
x = 7
−7x = 4
$x = -\frac{4}{7}$
−6x = −8
x = −8 : −6
$x = \frac{8}{6}$
$x = \frac{4}{3} = 1\frac{1}{3}$
$\frac{2}{3}x = -\frac{3}{8}$
$x = -\frac{3}{8} : \frac{2}{3}$
$x = -\frac{3}{8} * \frac{3}{2}$
$x = -\frac{9}{16}$
40,5 : x = −9
x = 40,5 : −9
x = −4,5
$-\frac{32}{63} : x = \frac{8}{21}$
$x = -\frac{32}{63} : \frac{8}{21}$
$x = -\frac{32}{63} * \frac{21}{8}$
$x = -\frac{4}{3} * \frac{1}{1}$
$x = -1\frac{1}{3}$
$x : \frac{2}{7} = -1,4$
$x = -1,4 * \frac{2}{7}$
$x = -\frac{7}{5} * \frac{2}{7}$
$x = -\frac{1}{5} * \frac{2}{1}$
$x = -\frac{2}{5}$
Пожауйста, оцените решение
