For this case what you must do is the following rule of three: 50 ---> 100 80 ----> x We clear x: x = (80/50) * (100) x = 160% 160-100 = 60% Answer: toni added 60% of the original value for his sale price
Let n be the first even integer, and n+2 will be the second even integer. (Why? Think 2 and 4, 2+2=4. This is the case for every consecutive even integers).
n + 3(n+2) = 54 n + 3n + 6 = 54 4n = 48 n = 12, n+2 = 14