11/19   Help.  Can this be solved for x? (how?)
                  x       dy
                ----- = -----
                 dx       y
        \_ Are x and y independent?
           \_ yes.
        \_ x!= 0.  When you divide out x and y, you get 1/d = d, or d=1.  Haha.
        \_ Are x and y independent?
           \_ yes.
        \_ As written, I don't think it is mathematically meaningful.
           \_ Okay, I asked the independent question and I now agree with this.
              Where did this equation come from?
        \_ It's basically a sistem of 1 equation and 2 unknowns.  As is, it
           could describe a class of vector fields.  Is there another equation
           that must also be satisfied?
        \_ xy=dxdy, you know dx, dy, and y right?
        \_ Are "dx" and "dy" differentials?