Final answer:
To simplify the expression using the associative property, we group the numbers together based on their operations. x + 32 + 18 simplifies to x + 50.
Step-by-step explanation:
To simplify the expression using the associative property, we group the numbers together based on their operations. Since addition is associative, we can group x and 32 together first, and then add 18. So, x + 32 + 18 can be written as (x + 32) + 18. Now, we can simplify the expression by adding the numbers inside the parentheses to get x + 50.