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**Hint:**The given equation is a differential equation. A differential equation is an equation which involves the derivatives of a variable (which is a dependent variable) with respect to another variable (which is an independent variable).

$\dfrac{{dy}}{{dx}} = f(x)$.

Here, $y$ is the dependent variable

$x$ is the independent variable

and $f(x)$ is a function in terms of the independent variable $x$.

A general solution of ${n^{th}}$ order differential equation can be said to be the solution that includes $n$ arbitrary constants. We can find the general solution of this differential equation by integrating both sides. The general solution of a differential equation is the relation between the x and y variable, that is obtained after the derivatives have been eliminated.

**Complete step by step answer:**

We have to find the general solution to the equation

$\dfrac{{dy}}{{dx}} = \dfrac{{3x}}{y}$

We will use variable separable method where we will separate the terms of a particular variable on each side of the equation. Re-arranging the above differential equation we can write the above equation as:

\[ \Rightarrow y \cdot dy = 3x \cdot dx\]

Now, taking integration to both the sides, we get:

\[

\Rightarrow \int {y \cdot dy} = \int {3x \cdot dx} \\

\Rightarrow \dfrac{{{y^2}}}{2} = \dfrac{{3{x^2}}}{2} + C \\

\Rightarrow \dfrac{{{y^2}}}{2} - \dfrac{{3{x^2}}}{2} = C \\

\]

**Hence, the general solution to $\dfrac{{dy}}{{dx}} = \dfrac{{3x}}{y}$ is given as \[\dfrac{{{y^2}}}{2} - \dfrac{{3{x^2}}}{2} = C\], where $C$ is the arbitrary constant.**

**Note:**We have used the variable separable method here to solve the question. In the variable separable method we try to separate all the terms of a particular variable on one side of the equation and then integrate both sides to find the solution. The solution of a differential equation is an equation in terms of given variables after eliminating the derivatives.

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