1.5n-3.2
First, we need to distribute -1.5. To do it we just multiply each term inside the parenthesis by -1.5:
[tex]-1.5(4-n)+2.8[/tex]
[tex]-1.5*4-1.5*-n+2.8[/tex]
[tex]-6+1.5n+2.8[/tex]
Now we just need to combine like terms:
[tex]1.5n+2.8-6[/tex]
[tex]1.5n-3.2[/tex]