Dan PrimackPhoto: Samuel Corum/Getty ImagesElon Musk said on Friday that xAI has acquired X, the social media app previously known as Twitter.Why it matters: This is Musk trying to prevent his Twitter investors from losing money, and highlights his eagerness to meld different parts of his corporate empire.Zoom in: Musk said that the all-stock merger valued xAI at $80 billion and X at $45 billion (including $12 billion of debt). A source familiar with the situation says that the combined company ...