Answer:
[tex]7a+3b+2[/tex]
Step-by-step explanation:
[tex]6a+3b+a+2[/tex]
Use commutative property of addition [tex]x+y=y+x[/tex]
[tex]6a+3b+a+2=6a+(a+3b)+2[/tex]
use associative property of addition [tex]x+(y+2)=(x+y)+2[/tex]
[tex]6a+(a+3b)+2=(6a+a)+3b+2\\=7a+3b+2[/tex]
Hence [tex]6a+3b+a+2=7a+3b+2[/tex]
