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

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Математика 6 класс Мерзляк. Номер №1119

−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}

ГДЗ Математика 6 класс Мерзляк, Полонский, Якир, 2018