- #1
megaboy123
Homework Statement
[/B]
example problem: 5 = [(x)(4+x)] / (4-x)
answer: 5
Homework Equations
Unsure what to use.
3. The Attempt at a Solution
Not sure what my professor did, but I thought that if i multiply by the reciprocal of something, I have to balance by multiplying the other side as well. It seems like everything just canceled out and the only thing left was x = 5. I would just like to know what algebraic property or technique can be used to find x BESIDES quadratic formula.