Question

"the sum of a number and 4."
answer?

Answer 1

x + 4

Explanation:

The sum - '+'

Of a number - 'x'

And four - '4'

The sum of a number and 4 would be 'x + 4'.

Hope this helps.

Answer 2

4+x

Explanation:

`Let\: the\:unknown\:number\:be \:x\\\\= x +4`