Answer
$-5 \lt x \lt 5$
Work Step by Step
RECALL:
$|x| \lt a \longrightarrow -a \lt x \lt a$
Using the rule above gives:
$|x| \lt 5 \longrightarrow -5 \lt x \lt 5$
Thus, the missing expression in the given statement is:
$-5 \lt x \lt 5$