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- October 16th 2007, 12:15 PM #1

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## 6x-y = 21 and 6y - x = 14, x-y?

As the title says, I want to find x-y, knowing that:

6x-y = 21 and 6y - x = 14

I have used substition methods but it seems to be complicating the question which looks as if it should be solved quickly because of its context.

Any help of how to tackle this problem would be appreciated.

- October 16th 2007, 12:40 PM #2

- October 16th 2007, 01:06 PM #3

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- October 16th 2007, 01:07 PM #4

- October 16th 2007, 02:44 PM #5

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