Question

The number on two consecutively numbered gym lockers have a sum of159. what are the locker numbers. Use comma to separate the answer

Answer 1

let x = first locker
x+1 = second locker

x + x + 1 = 159
2x + 1 = 159
2x = 158
x = 79
x+1 = 80

Answer 2

Let the locker numbers be x and x+1.
Then, x + (x+1) = 159
2x = 158
x = 79
x=1 = 80
(79 , 80) ---> ordered pair

Answer 3

About 50.4 billion pieces of unopened junk mail ends up in landfills each year. This is about 48% of all junk mail that is sent annually. How many pieces of junk mail are sent annually?