Answer: One necklace costs $15
Explanation:
We know Regan sold 14 necklaces but we do not know how many, we can use "x" to represent the amount of necklaces sold.
We will use the equation 14(x)=210 to represent our word problem
Use PEMDAS and divide both sides by 14, this will give you x=15
$15 per necklace is the answer