Answer
$9+105x$
Work Step by Step
We start with the given expression: $(4+105x)+5$
The commutative property of addition states that changing the order of the addends does not affect the sum.
We use this property to rearrange the addends: $5+(4+105x)$
The associative property of addition states that changing the grouping of the addends does not affect the sum.
We use this property to change the grouping of the addends: $(5+4)+105x$
We use the order of operations to simplify. We simplify inside the parentheses: $9+105x$
