Задание 1. Выполните деление. 1)-1: 0,2 = 6) 13 28:(39 49) = 7) 12 55:(-8 33) = -12.6 55 9-1:(-8)- 11) -1,4 12) 13) -2,8 0,9 -5,4 8:-3 3-5 = 14)-8,6:(-1)- 11 15) -1 2 21 7 8 -4,8:1- 15 2) 4: (-0,8) = 3)-50:(-2,5) = 8) 4) 10:(-0,2) 5)-8:0,5 = Задание 2. Решите уравнение. 1) -2x+6= -5 2)-x+4=5 3) 5-x=41

-1 : 0,2 = -5

4 : (-0,8) = -5

-50 : (-2,5) = 20

10 : (-0,2) = -50

-8 : 0,5 = -16

\[\frac{13}{28} : (-\frac{39}{49}) = \frac{13}{28} \cdot (-\frac{49}{39}) = \frac{13 \cdot (-49)}{28 \cdot 39} = \frac{13 \cdot (-7 \cdot 7)}{4 \cdot 7 \cdot 3 \cdot 13} = -\frac{7}{4 \cdot 3} = -\frac{7}{12}\]

Ответ: -\frac{7}{12}

\[\frac{12}{55} : (-\frac{8}{33}) = \frac{12}{55} \cdot (-\frac{33}{8}) = \frac{12 \cdot (-33)}{55 \cdot 8} = \frac{3 \cdot 4 \cdot (-3 \cdot 11)}{5 \cdot 11 \cdot 2 \cdot 4} = -\frac{3 \cdot 3}{5 \cdot 2} = -\frac{9}{10}\]

Ответ: -\frac{9}{10}

\[-1\frac{2}{5} : \frac{6}{5} = -\frac{7}{5} : \frac{6}{5} = -\frac{7}{5} \cdot \frac{5}{6} = -\frac{7 \cdot 5}{5 \cdot 6} = -\frac{7}{6} = -1\frac{1}{6}\]

Ответ: \(-1\frac{1}{6}\)

\[-1\frac{1}{5} : (-3\frac{3}{5}) = -\frac{6}{5} : (-\frac{18}{5}) = -\frac{6}{5} \cdot (-\frac{5}{18}) = \frac{6 \cdot 5}{5 \cdot 18} = \frac{6}{18} = \frac{1}{3}\]

Ответ: \(\frac{1}{3}\)

\[-1\frac{11}{21} : 2\frac{2}{7} = -\frac{32}{21} : \frac{16}{7} = -\frac{32}{21} \cdot \frac{7}{16} = -\frac{32 \cdot 7}{21 \cdot 16} = -\frac{2 \cdot 16 \cdot 7}{3 \cdot 7 \cdot 16} = -\frac{2}{3}\]

Ответ: \(-\frac{2}{3}\)

\[\frac{-1,4}{-2,8} = \frac{1,4}{2,8} = \frac{14}{28} = \frac{1}{2}\]

Ответ: \(\frac{1}{2}\)

\[\frac{0,9}{-5,4} = -\frac{0,9}{5,4} = -\frac{9}{54} = -\frac{1}{6}\]

Ответ: \(-\frac{1}{6}\)

\[8 : (-3\frac{3}{5}) = 8 : (-\frac{18}{5}) = 8 \cdot (-\frac{5}{18}) = -\frac{8 \cdot 5}{18} = -\frac{4 \cdot 5}{9} = -\frac{20}{9} = -2\frac{2}{9}\]

Ответ: \(-2\frac{2}{9}\)

\[-3,6 : (-1\frac{4}{5}) = -3,6 : (-\frac{9}{5}) = -3,6 \cdot (-\frac{5}{9}) = \frac{3,6 \cdot 5}{9} = \frac{18}{9} = 2\]

Ответ: 2

\[-4,8 : \frac{8}{15} = -4,8 \cdot \frac{15}{8} = -\frac{4,8 \cdot 15}{8} = -\frac{72}{8} = -9\]

Ответ: -9

-2x + 6 = -5

-2x = -5 - 6

-2x = -11

x = \(\frac{-11}{-2}\)

x = 5,5

\[\frac{3}{7}x + 4 = 5\frac{4}{7}\]

\[\frac{3}{7}x = 5\frac{4}{7} - 4\]

\[\frac{3}{7}x = 1\frac{4}{7}\]

\[\frac{3}{7}x = \frac{11}{7}\]

\[x = \frac{11}{7} : \frac{3}{7}\]

\[x = \frac{11}{7} \cdot \frac{7}{3}\]

\[x = \frac{11}{3}\]

x = 3\(\frac{2}{3}\)

\[5 - \frac{8}{9}x = 4\frac{1}{81}\]

\[-\frac{8}{9}x = 4\frac{1}{81} - 5\]

\[-\frac{8}{9}x = -\frac{80}{81}\]

\[x = -\frac{80}{81} : (-\frac{8}{9})\]

\[x = -\frac{80}{81} \cdot (-\frac{9}{8})\]

\[x = \frac{80 \cdot 9}{81 \cdot 8}\]

\[x = \frac{10 \cdot 1}{9 \cdot 1}\]

x = \(\frac{10}{9}\) = 1\(\frac{1}{9}\)