(KJV) 2 Kings 15:30
30 And Hoshea the son of Elah made a conspiracy against Pekah the son of Remaliah, and smote him, and slew him, and reigned in his stead, in the twentieth year of Jotham the son of Uzziah.
(KJV) 2 Kings 17:1
1 In the twelfth year of Ahaz king of Judah began Hoshea the son of Elah to reign in Samaria over Israel nine years
In the above text Hoshea is supposed to have started reigning in twentieth year of Jotham which so happens to be the fourth year of Ahaz's reigns.
But in the other text Hoshea started reigning in the twelth year of Ahaz's reign.
How can we reconcile the apparent contraction?