I don't think I've ever mastered this concept. If I have a problem like , can I just divide the x out to get ?

I know if I look at the first expression like then I could turn x/x into 1, but the expression would look like . The x could get brought back into the quotient if it had a common denominator.

Also, if the sample problem were would that make a difference in mathematical rules for dividing out the x? (As opposed to addition or subtraction).

I hope my question makes sense, if not I can explain more.