I Think It Is A Sum

[ronreid]

looking for an answer ..the first is twice the second, the third twice the first. thanks for any help

[Baldric]

Try Googling the clue just as you've written it here, normally works

[margarettom]

Are you sure there isn't any more to this question?

[fiction-factory]

There is normally more to the question. There are so many variants of it that it's not worth suggesting any particular one

[fiction-factory]

Here's an example of a similar, but more complete, question
https://www.examveda.com/of-the-three-numbers-the-first-is-twice-the-second-and-the-second-is-twice-the-third-the-average-of-the-reciprocal-of-the-numbers-is-772-the-numbers-are-643/

[Davemano]

Not seen this before, but 7 seems appropriate 2 1 4. That is too simple. No doubt completely on the wrong track but it fits.