SOLUTION: Cassidy is twice as old as Dylan. Phoebe is 5 years younger than Cassidy. The sum of the ages of the three children is 25. How old are they?

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Dilan    x years old

Cassidy  2x years old

Phoebe   2x-5 years old


The sum

    x + 2x + (2x-5) = 25.


From this point, complete the solution on your own.