For this case we have the following expression:
[tex]\frac {2} {5} m- \frac {4} {5} - \frac {3} {5} m =[/tex]
We add similar terms:
[tex]\frac {2} {5} m- \frac {3} {5} m- \frac {4} {5} =[/tex]
Different signs are subtracted and the sign of the major is placed:
[tex]\frac {2-3} {5} m- \frac {4} {5} =\\- \frac {1} {5} m- \frac {4} {5} =[/tex]
The expression is simplified as:
[tex]\frac {-m-4} {5}[/tex]
ANswer:
[tex]\frac {-m-4} {5}[/tex]