Помогите. аожалуста!!!

$= \frac{19}{12} :( \frac{9}{24} + \frac{10}{24} )= \frac{19}{12} : \frac{19}{24} = \frac{19}{12} * \frac{24}{19} =2 \\ \\$

------------------------------------------------------------------------
$= \frac{17}{36} :( \frac{21}{36} - \frac{20}{36} )= \frac{17}{36} : \frac{1}{36} = \frac{17}{36} * \frac{36}{1} =17$

=19/12:(9/24+10/24)=19/12:19/24=19/12*24/19=2

--------------------------------------------------------------------------------
=17/36:(21/36-20/36)=17/36:1/36=17/36*36/1=17
------------------------------------------------------------------------------------