1)

[tex] - 1.2x = - 36 \\ 12x = 36 \\ x = 36 \div 1 \\ x= 3[/tex]

2)

[tex] \frac{1}{3} \div x = - \frac{2}{9} \\ x = \frac{1}{3} \div ( - \frac{2}{9} ) \\ x = - \frac{9}{3 \times 2} \\ x = - \frac{3}{2} \\ x = - 1 \frac{1}{2} \\ x = - 1.5[/tex]

3)

[tex] - \frac{5}{9} x = - 1 \frac{13}{27} \\ x = 1 \frac{13}{27} \div \frac{5}{9} \\ x = \frac{40 \times 9}{27 \times 5} \\ x = \frac{8}{3} \\ x = 2 \frac{2}{3} [/tex]

4)

[tex] - 2 \frac{1}{3} x = \frac{7}{15} \\ x = \frac{7}{15} \div ( - 2 \frac{1}{3} ) \\ x = - \frac{7 \times 3}{15 \times 7} \\ x = - \frac{1}{5} \\ x = - 0.2[/tex]

Пошаговое объяснение:

-1,2х = -3,6

х = -3,6 : (-1,2)

х = 3

1/3 : х = -2/9

х = 1/3 : (-2/9)

х = 1/3 * (-9/2)

х = -9/6

х = -3/2

х = -1 1/2

-5/9х = -1 13/27

-5/9х = -40/27

х = -40/27 : (-5/9)

х = -40/27 * (-9/5)

х = -8/3 * (-1/1)

х = 8/3

х = 2 2/3

-2 1/3х = 7/15

-7/3х = 7/15

х = 7/15 : (-7/3)

х = 7/15 * (-3/7)

х = 1/5 * (-1/1)

х = -1/5