Corey is 2 times older than Brad. If the sum of their ages is 54, how old is Corey?
Let Brad's age = x then Corey's = 2x
And we know that
x + 2x = 54 simplify
3x = 54 divide both sides by 3
x = 18 this is Brad's age
2x = 2(18) = 36 this is Corey's age
