Variables separable method
General differential equation of first order and first degree is of the form
M + Ndy/dx = 0
Where M and N are any functions of x and y.
If M = f(x) and N = g(y), the equation can be written as
f(x) + g(y)dy/dx = 0
=>
g(y)dy = -f(x)dx
Integrating both sides
∫g(y)dy = ∫-f(x)dx +c
When the M and N can be separated into f(x) and g(y), the equation is called as an equation with separable variable
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