Question

1/3 (12r + 6r - 21) write an expressoin

Answer 1

Answer: An expression for 1/3 (12r + 6r - 21) would be :

(1/3) * (12r + 6r - 21)

It is the product of 1/3 and the sum of 12r, 6r and -21

or

(4r - 7)

It is the same as above but simplified by combining like terms 12r + 6r = 18r and then dividing by 3.

Explanation:

Answer 2

9r-7

Explanation:

Given expression,

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

Distribute ,

`(1)/(3)(12r) +(1)/(3)(6r)+(1)/(3)(-21)\\`

simplify,

`7r + 2r -7`

Add like terms,

`9r -7`

And we are done!

- Rishabh