Question

Which expression is equivalent to 1/3(12x+6x-21)

Answer 1

`6x-7`

Explanation:

`(1)/(3) (12x + 6x -21)`

break it into pieces

`(1)/(3)*12x = 4x`

`(1)/(3)*6x=2x`

`(1)/(3) *-21=-7`

put it all together

*since there's no negative in front of the other numbers except 7 they're positive so you add them*

`4x + 2x - 7`

simplify

`6x - 7`