How much time passed before Moses led the Israelites out of Egypt?
430 years passed before Moses led the Israelites out of Egypt. The 430 years were completed at that time, covering the period from Jacob's descent into Egypt until the Exodus, when the nation gathered around Mount Sinai. This timeline is confirmed by the completion of the 430 years.
Les explains that Jacob ended up in Egypt with all his sons, and they came out 215 years later with 5, 6, 7 million souls. Another 215 years passed, and then Moses led the children of Israel out of Egypt. The 430 years were then completed, and the nation gathered around Mount Sinai. He also points out that from Genesis 1 until Exodus 20, there were no written do's and don'ts from God, and no organized system of worship was instituted until that time.