> Can you tell me what I did wrong here?

Can you tell me what I did wrong here?

Posted at: 2014-06-09 
Here is the image of my work: The prompt was to find the solution X = ____________________... Could be multiple answers, but at the very bottom I got x=3 I guess it's a math mistake but I'm not sure where. Could it be that the -1(7x+3) which I turned into -7x-3???? Not sure!!! Thanks :D
The factors of 3x^2 + 5x - 2 are (3x - 1)(x + 2) So, I think the LCD is: (3x + 2)(3x -1)(x + 2)(x - 1).