Problem

Solve the given differential equation by using an appropriate substitution. The DE is homogeneous.
\[
x d x+(y-2 x) d y=0
\]

Answer

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Answer

\(\boxed{y = x*(1 + \exp(C1 + \text{LambertW}(-x*\exp(-C1)))/x)}\) is the final solution to the given homogeneous differential equation.

Steps

Step 1 :Given the homogeneous differential equation \(x dx+(y-2 x) dy=0\)

Step 2 :We use the substitution \(y=vx\). The derivative of \(y\) with respect to \(x\) (\(dy/dx\)) will then be \(v + x dv/dx\).

Step 3 :Substitute these into the differential equation and solve for \(v\).

Step 4 :The solution to the differential equation in terms of \(v\) is \(v(x) = 1 + \exp(C1 + \text{LambertW}(-x*\exp(-C1)))/x\).

Step 5 :Substitute \(v\) back into \(y = vx\) to get the solution in terms of \(y\).

Step 6 :\(y = x*(1 + \exp(C1 + \text{LambertW}(-x*\exp(-C1)))/x)\)

Step 7 :\(\boxed{y = x*(1 + \exp(C1 + \text{LambertW}(-x*\exp(-C1)))/x)}\) is the final solution to the given homogeneous differential equation.

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