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July 28, 2014

July 28, 2014

Posted by **Arran** on Friday, January 28, 2011 at 5:51am.

could you pleas show method

thanks

- Maths -
**Reiny**, Friday, January 28, 2011 at 8:17amfirst expand

9 - 12d = 57

subtract 9 from both sides

-12d = 48

divide both sides by -12

d = -4

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