Question

The sum of a number x and 84

Answer 1

84+x  or x+84 would be the equations you are looking for.

Answer 2

Answer: x+84 is the required expression.

Explanation:

Let the number be 'x'.

Another number = 84

According to question, sum of a number and 84 , means

Addition of x and 84

Mathematically, it is expressed as

x + 84.

Hence, x+84 is the required expression.