Word Problem:Two companies working together can clear a parcel of land in 7 hours. Working alone, it would takeCompany A6 hours longer to clear the land than it wouldCompany B. How long would it takeCompany Bto clear the parcel of land alone?

This is what I did:

Company A:x+6

Company B:x

Then it asked me to make an equation out of it. My answers we're all wrong, so I gave up and looked for the answer. And this is what they said:

** Can somebody explain to me why the numerators are 1s?

I got this far:x²-8x-42=0

Then, says I have to use the Quadratic Formula.

Tried to solve it but I always end up with a radical.. which is:(8±2√58)/2

and if simplified, would be (?):4±√58

I re-checked several times but I cannot see what I did wrong..

I appreciate any help.

Thank You,

Azusa.