Решите уравнение:
1) 9x = −54;
2) 1,2x = −6;
3) 13x = −6;
4) −21x = 48;
5) $2\frac{1}{7}x = -1\frac{11}{14}$;
6) −3,78 : x = −0,6;
7) $x : (-1\frac{3}{13}) = -0,26$;
8) 18 : (−x) = 0,6.
9x = −54
x = −54 : 9
x = −6
1,2x = −6
x = −6 : 1,2
x = −5
13x = −6
$x = -\frac{6}{13}$
−21x = 48
$x = -\frac{48}{21}$
$x = -\frac{16}{7} = -2\frac{2}{7}$
$2\frac{1}{7}x = -1\frac{11}{14}$
$x = -1\frac{11}{14} : 2\frac{1}{7}$
$x = -\frac{25}{14} : \frac{15}{7}$
$x = -\frac{25}{14} * \frac{7}{15}$
$x = -\frac{5}{2} * \frac{1}{3}$
$x = -\frac{5}{6}$
−3,78 : x = −0,6
x = −3,78 : (−0,6)
x = 6,3
$x : (-1\frac{3}{13}) = -0,26$
$x = -0,26 * (-1\frac{3}{13})$
$x = -\frac{13}{50} * (-\frac{16}{13})$
$x = -\frac{1}{25} * (-\frac{8}{1})$
$x = \frac{8}{25}$
18 : (−x) = 0,6
−x = 18 : 0,6
−x = 30
x = −30
Пожауйста, оцените решение