X+5=2x+5 pls help lol

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)