Answer
$x \cdot 9$
Work Step by Step
RECALL:
The commutative property of multiplication states that for any real numbers $a$ and $b$,
$ab=ba$
If you apply the commutative property of multiplication to $9x$. you'd get $x\cdot9$ as an equivalent expression.
Thus, the given algebraic expression is equivalent to:
$x \cdot 9$