Question

Which expression represents the phrase, "one third the sum of 12 and a number"?

Answer 1

Let

x--------> the number

we know that

1) the phrase, "the sum of 12 and a number"

represent the expression -------->
`(12+x)`

and

2) the complete phrase, "one third the sum of 12 and a number"

represent the expression -------->
`(1)/(3)(12+x)`

therefore

the answer is

`(1)/(3)(12+x)`

Answer 2

1/3(12 + x) is your answer

you must get the sum first before you can one third it

hope this helps