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February 28, 2015

February 28, 2015

Posted by **ANON** on Monday, September 10, 2012 at 8:14pm.

8/x-1=9/(x)(x+2)

i know the answer is -1,7 but how?

- math -
**Reiny**, Monday, September 10, 2012 at 8:31pmI subbed your solution values into the equation the way you typed it and neither solution works

they do work if you meant

8/x - 1 = 9/(x(x+2)) ,

so I will start from there

multiply each term by x(x+2)

8(x+2) - x(x+2) = 9

8x + 16 - x^2 - 2x = 9

x^2 -6x -7 = 0

(x-7)(x+1) = 0

x = 7 or x = -1

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