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

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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) About Me  (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
F=x%2B21
B=x%2B3
x%2BB=F
So we conclude
x%2B%28x%2B3%29=x%2B21
2x%2B3=x%2B21
x=18
Adam is 18 years old.
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