Ответ:

1.

[tex] \frac{x}{ - 2.3} = \frac { - 5.8}{ - 4.6} [/tex]

[tex]x = \frac{ - 2.3 \times ( - 5.8)}{ - 4.6} [/tex]

x=-2.9

2.

[tex] \frac{ - 2.8}{35} = \frac{ - 4.2}{x} [/tex]

[tex]x = \frac{35 \times ( - 4.2)}{ - 2.8} [/tex]

x=2.5

3.

[tex]2 \frac{2}{9} = 2.2[/tex]

[tex]11 \frac{2}{3} = 11.6[/tex]

[tex] - 1\frac{2}{5} = - 1.4[/tex]

[tex]x = \frac{2.2 \times ( - 1.4)}{11.6} [/tex]

x= -0.26

4.

[tex] \frac{2}{7} = 0.28[/tex]

[tex] \frac{3}{14} = 0.21[/tex]

[tex] \frac{5}{6} = 0.83[/tex]

[tex]x = \frac{0.28 \times 0.83}{0.21} [/tex]

x=1.1