There was no death before Adam, because Adam was first designed to live eternally before the fall. Death came after the Fall that's what the Bible implied here:
(Genesis 3: 2-3 )2 The woman said to the serpent, “We may eat fruit from the trees in the garden, 3 but God did say, ‘You must not eat fruit from the tree that is in the middle of the garden, and you must not touch it, or you will die.’”