SOLUTION: How do I write this problem into an equation: Alex and Alicia are twins. Kevin is 5 years older than the twins. Their ages total 53. How old are the twins?

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Question 240778: How do I write this problem into an equation:
Alex and Alicia are twins. Kevin is 5 years older than the twins. Their ages total 53. How old are the twins?
Answer by vleith(2517) About Me  (Show Source):
You can put this solution on YOUR website!
Let the twins age be given by A. You are told Kevin is 5 years older than the twins, so his age is A%2B5
You are told the three of their ages total 53
AgeTwin1+%2B+Agetwin2+%2B+AgeKevin+=+53
A+%2B+A+%2B+%28A%2B5%29+=+53
3A+%2B+5+=+53
3A+=+48
A+=+16
So the twins are sweet sixteen and Kevin is 21.
Check your answer is 16+16+21 = 53?