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## Homework Statement

i have the equation dy/dx = [tex]\frac{(y/x)-4}{1-(y/x)}[/tex]

i am told that v(x)=xy

and v=y/x

Express this using v, dv/dx, and x

I can get dy/dx = [tex]\frac{(v)-4}{1-(v)}[/tex] but that's it

## Homework Equations

??

## The Attempt at a Solution

I don't even know how to do dv/dx

can anyone help. im so confused?