One third the sum of 12 and a number

(12+x) : 3

Step-by-step explanation:

you do twelve plus x because the sum of 12 and a number is just adding 12 to a variable. then to find a third of that you divide by 3

Answer: 1/3 (12+x)

Step-by-step explanation:

One third the sum of 12 and a number can be written as 1/3 (12+x). This equation can also be simplified to 4 + x/3, but sense the question doesn't ask you to do so, the answer most likely is 1/3 (12+x).