Answer:
[tex]6x-7[/tex]
Step-by-step explanation:
[tex]\frac{1}{3} (12x + 6x -21)[/tex]
break it into pieces
[tex]\frac{1}{3}*12x = 4x[/tex]
[tex]\frac{1}{3}*6x=2x[/tex]
[tex]\frac{1}{3} *-21=-7[/tex]
put it all together
*since there's no negative in front of the other numbers except 7 they're positive so you add them*
[tex]4x + 2x - 7[/tex]
simplify
[tex]6x - 7[/tex]
