How much time do you serve if you get a life sentence and a 20 year sentence in state prison?

If someone is serving both a life sentence and a 20-year sentence in state prison, they would typically serve the longer sentence first. Once the 20-year sentence is completed, they would then begin serving the life sentence. It's important to note that the actual time served can vary based on factors like good behavior, parole eligibility, and potential sentence reductions.