Đáp án + Giải thích các bước giải:

`( 7 - 1/2 - 3/4 )` `:` `( 5 - 1/4 - 5/8 )` 

`=` `( 28/4 - 2/4 - 3/4 )` `:` `( 40/8 - 2/8 - 5/8 )` 

`=` `( {28 - 2 - 3}/ 4 )` `:` `( {40 - 2 - 5}/ 8 )` 

`=` `23/4` `:` `33/8` 

`=` `23/4` `.` `8/33` 

`=` `184/132`

`=` `46/33` 

`tt(#TuHoan)`

\begin{array}{c}\color{#A61123}{\texttt{˚𝜗}}\color{#C92A3E}{\texttt{L}}\color{#EAE3D2}{\texttt{i}}\color{#F5EFE6}{\texttt{L}}\color{#363B59}{\texttt{i}}\color{#1B2238}{\texttt{u}}\color{#0F1424}{\texttt{m}}\color{#070A12}{\texttt{𝜚˚}}\end{array}