Respuesta :

By arranging similar terms, we have

[tex]\begin{gathered} 6a+5a+2a-a-5 \\ \text{which gives} \\ 13a-a-5 \end{gathered}[/tex]

since 13a minus a is 12a, the answer is

[tex]12a-5[/tex]

which corresponds to option 2 from top to bottom