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February 28, 2015

February 28, 2015

Posted by **Kay** on Wednesday, July 1, 2009 at 7:46pm.

please explain in detail, I am having trouble once I get to the part where I need to simplify. I have so far the LCD is x^2-9

then the equation changes to (x^2-9) 5/x-3+(x^2-9) 3/x+3=(x^2-9) 7x/x^2-9

or (x+3)*5(x-3)*3=7x after this I'm stuck. Thank you in advance.

- math-rational equations -
**Damon**, Wednesday, July 1, 2009 at 8:44pmmultiply both sides by (x^2-9) which is (x+3)(x-3)

5 (x+3)(x-3)/(x-3) +3 (x+3)(x-3)/(x+3) = 7x

5(x+3) + 3(x-3) = 7x

Now that is

5x+15+3x-9 =7x

8x+6 = 7x

x+6=0

x=-6

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