Genesis 37:2 NASB95
These are the records of the generations of Jacob. Joseph, when seventeen years of age, was pasturing the flock with his brothers while he was [still] a youth, along with the sons of Bilhah and the sons of Zilpah, his father's wives. And Joseph brought back a bad report about them to their father.

Genesis 41:46 NASB95
Now Joseph was thirty years old when he stood before Pharaoh, king of Egypt. And Joseph went out from the presence of Pharaoh and went through all the land of Egypt.

Genesis 41:50-52 NASB95
Now before the year of famine came, two sons were born to Joseph, whom Asenath, the daughter of Potiphera priest of On, bore to him. Joseph named the firstborn Manasseh, "For," [he said,] "God has made me forget all my trouble and all my father's household." He named the second Ephraim, "For," he said, "God has made me fruitful in the land of my affliction."

Genesis 45:6 NASB95
"For the famine has been in the land these two years, and there are still five years in which there will be neither plowing nor harvesting.

30 + 7 + 2 = 39 Age of Joseph when he invites his family to Egypt
Joseph had been in Egypt 39 - 17 = 22 years

Genesis 47:9 Jacob was 130 years old when he meets Pharaoh