What is a separable differential equation? how do you solve it?

A separable differential equation is a first-order differential equation in which the expression for dy/dx can be factored as a function of x times a function of y,
that is, dy/dx = g(x) f(y). We can solve this equation by integrating both sides of the equation dy/f(y) = g(x)dx.

$1.33 Per Bottle

Step-by-step explanation:

Simply divide 4 by 3 to get 1.33

1.33 is the cost

you can verify this by multiplying 1.33 x 3 to get 4