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September 2, 2014

September 2, 2014

Posted by **dillon** on Saturday, September 14, 2013 at 11:48pm.

- math -
**Graham**, Saturday, September 14, 2013 at 11:59pmRearrange 7x=4y

<=> y = 7x/4

Substitute into y/z = 7/5

<=> 7x/4z = 7/5

Cancelling common factor (7) and rearranging:

.: x/z = 4/5

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