SOLUTION: Adam is x years old. His father is 21 years older than Adam. His brother is 3 years younger than Adam. The brothers ages added together equal their father's age. Write an equation

Question 964374: Adam is x years old. His father is 21 years older than Adam. His brother is 3 years younger than Adam. The brothers ages added together equal their father's age.
Write an equation using X.

Answer by hkwu(60) (Show Source): You can put this solution on YOUR website!
Let F denote the father's age. Let B denote Adam's brother's age. Then

So we conclude

Adam is 18 years old.
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