You can
put this solution on YOUR website!
You start by looking for the words "a number".
That's N (or any letter you choose, capital or small)
Then you look at "twice a number"
That means to multiply the number N by 2
That's 2N
Then you look at "3 more than twice a number""
To make something 3 more you add on 3 with a plus
sign and a 3.
Answer:
2N + 3
Edwin