Can someone solve the system of equations ?

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount

Aresearch study is done to find the average age of all u. s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample

The associative, commutative, and distributive properties can be used on rational equations. true or false