Question 1051809
 An oriental rug is 52 years old and a Persian rug is 16 years old.
 How many years ago was the oriental rug four times as old as Persian rug 
:
let y = no. of years for this to be true
:
A simple equation
52 - y = 4(16 - y)
52 - y = 64 - 4y
-y + 4y = 64 - 52
3y = 12
y = 12/3
y = 4 yrs ago
:
:
You can check that for yourself in the given statement.