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July 2nd, 2011, 04:11 PM  #1 
Newbie Joined: Jul 2011 Posts: 20 Thanks: 0  Stuck on an equation
i am having trouble breaking this down. can someone help me out with this? It's a rational expression. I believe the LCD is 2(x+1) 2(x2) but that's as far as I have gotten. If anyone can help it would be awesome! 
July 2nd, 2011, 04:24 PM  #2 
Global Moderator Joined: Nov 2009 From: Northwest Arkansas Posts: 2,766 Thanks: 4  Re: Stuck on an equation
I would choose 4(x + 1)(x  1) as a common denominator. Notice that you can write your equation as: Would you care to multiply by the LCD and show us your progress? 
July 2nd, 2011, 05:19 PM  #3 
Newbie Joined: Jul 2011 Posts: 20 Thanks: 0  Re: Stuck on an equation
OK I multiplied by the LCD and got 6(x1)5(x+1)=8x That would distribute out to 6x65x5=8x and then x11=8x and then 8x+x11=0? this is where I'm not sure. Am I ok up to that point? 
July 2nd, 2011, 05:54 PM  #4 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs  Re: Stuck on an equation
Yes, you've done fine so far. I would back up one step to: x  11 = 8x Subtract x from both sides: 11 = 7x Divide through by 7: (11/7) = x 
July 2nd, 2011, 06:04 PM  #5 
Newbie Joined: Jul 2011 Posts: 20 Thanks: 0  Re: Stuck on an equation
awesome, thanks very much


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