Read Luke 3:23 Using Other Translations
And Jesus himself began to be about thirty years of age, being (as was supposed) the son of Joseph, which was the son of Heli,
Jesus, when he began his ministry, was about thirty years of age, being the son (as was supposed) of Joseph, the son of Heli,
Jesus was about thirty years old when he began his public ministry. Jesus was known as the son of Joseph. Joseph was the son of Heli.