SOLUTION: the sum of david's age and his mother's age is 30.david's mother is four times as old as david.how old is david?

SOLUTION: the sum of david's age and his mother's age is 30.david's mother is four times as old as david.how old is david?

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Question 310734: the sum of david's age and his mother's age is 30.david's mother is four times as old as david.how old is david?
Answer by JBarnum(2146) (Show Source): You can put this solution on YOUR website!
D+M=30
M=4D
D+4D=30
5D=30
D=6
M=24
D=david
M=mother
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