Cross Products Rule

Question

x

y= ----

x+2

I am trying to solve for x:

x=y(x+2)

x= xy+2y

xy-x=-2y

This all makes sense to this point and then my book says:

x(x-1)=-2y

Where did that y in xy go?

Answer 1

It should be x(y-1) = -2y. Books sometimes have errors.