Respuesta :

candystarlover4
Step 1. Simplify 
[tex]3a+9[/tex]

[tex]3a+9[/tex] is your answer:

Done! :)
combine like terms which are 5a and 2a which=3a then you have 3a=9 so then you divide 3 on both sides and then you get 3 which is your answer so a=3