How Would I simplify 4x/4x - 8? My teacher put 4x/4x - 8 = -8/x. As you can see the -8 is in the denominator and she just randomly puts it in the numerator instead. Then she puts the x in the denominator which i already get. I just wanna know how the hell did she put the -8 in the numerator?
Here Is What She Did: http://imgur.com/UipcP

Question

How Would I simplify 4x/4x - 8? My teacher put 4x/4x - 8 = -8/x. As you can see the -8 is in the denominator and she just randomly puts it in the numerator instead. Then she puts the x in the denominator which i already get. I just wanna know how the hell did she put the -8 in the numerator?
Here Is What She Did: http://imgur.com/UipcP

anonymous · Answer

Tip: Do componendo and dividendo. Search on google for that :)

anonymous · Answer

See here. Only apply for LHS http://in.answers.yahoo.com/question/index?qid=20110327062443AAfegxJ