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July 25, 2014

Posted by **ASDFGHJKL;** on Monday, October 31, 2011 at 4:56am.

Please include workings thx

- Math -
**drwls**, Monday, October 31, 2011 at 8:07amThe common denominator is (30C - 15D).

4C/(10C-5D) + 2D/(6C-3D)

= (12C + 10D)/(30C - 15D)

= 2(6C + 5D)/15(2C - D)

= (2/15)[(6C +5D)/(2C -D)].

I see no further simplifications.

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