Помогите пожалуйста срочно даю 27 баллов!

$\frac{ 6 \frac{4}{5} }{1 \frac{2}{15} } = \frac{ \frac{34}{5} }{ \frac{17}{15} } = \frac{34}{5} \times \frac{15}{17} = \frac{2}{1} \times \frac{3}{1} = \frac{6}{1} = 6$
$\frac{ - 1 \frac{1}{3} }{2 \frac{1}{6} } = \frac{ - \frac{4}{3} }{\frac{13}{6} } = - \frac{4}{3} \times \frac{6}{13} = - \frac{4}{1} \times \frac{2}{13} = - \frac{8}{13}$
а)
$\frac{x}{ - 2.3} = \frac{ - 5.8}{ - 4.6}$
-4,6х=13,34
x=-2,9

б)
$\frac{ - 2.8}{35} = \frac{ - 4.2}{x}$
-2,8х=-147
х=52,5

в)
$\frac{ - 2 \frac{2}{9} }{x} = \frac{11 \frac{2}{3} }{ - 1 \frac{2}{5} }$
$\frac{ - \frac{20}{9} }{x} = \frac{ \frac{35}{3} }{ - \frac{7}{5} }$
$\frac{35}{3} \times x = - \frac{20}{9} \times ( - \frac{7}{2} )$
$\frac{35}{3} \times x = \frac{10 \times7 }{9 \times 1}$
$x = \frac{ \frac{70}{9} }{ \frac{35}{3} } = \frac{70}{9} \times \frac{3}{35} = \frac{2}{3} \times \frac{1}{1} = \frac{2}{3}$

г)
$\frac{ - \frac{2}{7} }{ \frac{3}{14} } = \frac{x}{ \frac{5}{6} }$
$\frac{3}{14} \times x = - \frac{2}{7} \times \frac{5}{6}$
$\frac{3}{14} \times x = - \frac{1}{7} \times \frac{5}{3}$
$\frac{3}{14} \times x = - \frac{5}{21}$
$x = \frac{ - \frac{5}{21} }{ \frac{3}{14} } = - \frac{5}{21} \times \frac{14}{3} = - \frac{5}{3} \times \frac{2}{3} = - \frac{10}{9} = - 1 \frac{1}{9}$