First you had to expanded form.
[tex]-4(2a+5)=-8a-20[/tex]
[tex]9a-8a-20[/tex]
Finally you can also add by similar to elements.
[tex]9a-8a=a[/tex]
[tex]a-20[/tex]
Final answer: [tex]\boxed{=a-20}[/tex]
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie
