Question

What is the mathematical expression of “the sum of a number x and three”

Answer 1

SUM MEANS ADDITION

HERE IT MEANS THE ADDITION OF x and 3

written as

`x + 3`

HOPE THIS HELPS

Answer 2

Answer: X + 3

Explanation:

Sum hints as to an addition statement and it specifies a variable X and the number 3 so the expression would be X + 3.