SOLUTION: Tom is 8. His mom is 31. How long before she is twice his age?

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Question 20144: Tom is 8. His mom is 31. How long before she is twice his age?
Answer by kapilsinghi(68) About Me  (Show Source):
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Tom is 8. His mom is 31. How long before she is twice his age?
let x years from now age of mother is twice the age of tom
so 2*(8+x) = 31+x
16+2x = 31 +x
x= 15
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