Ihave a question about i need to use substitution to solve the system of equations x + y = 12 & x - y = 2. pls show work..

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i