# SOLUTION: Mary is three times older than Joseph the sum their ages is 29

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 Click here to see ALL problems on Age Word Problems Question 253447: Mary is three times older than Joseph the sum their ages is 29Answer by Nikki456(9)   (Show Source): You can put this solution on YOUR website!Since you didnt specify what the question was, I assume that you meant to find their ages. You could let mary be represented as x and joseph be represented as y. So you could set up two equations and substitute: 1)3y=x 2)x+y=29 You substitute equation 1 into 2. you get 3) 3y+y=29 simplify: 3)4y=29 y:7.25 To find Mary's age, you could plug in your answer for Joseph into the first equation. 1)3(7.25)= 21.75 So your answer would be: Mary= 21.75 or 21 3/4 yrs old Joseph= 7.25 or 7 1/4 yrs old