What is 5x plus 3 23?

The expression "5x plus 3 23" seems to have a typographical error or is unclear. If you meant "5x + 3" and "23" as separate components, it can be interpreted as the equation (5x + 3 = 23). To solve for (x), you would subtract 3 from both sides to get (5x = 20) and then divide by 5, resulting in (x = 4). If this interpretation is not what you intended, please clarify the question.