Scientists calculations pose new questions about the existence of Dark Matter.

I have posted on the subject before, but to repeat-

The simple basic equation for the force of attraction of bodies by gravity is:
Fg = G X M1 X m2 / ( r x r) where:

Fg= force due to gravitational attraction of two masses
G= gravitational constant
M1= mass of body 1
M2= mass of body 2
r= distance between the M1 to m2

The attraction between two bodies creates acceleration due to gravity. (On earth it is 32.2 ft/sec/sec). The observation of the movement of stars around a galaxy indicates that the velocity is more than can be accounted for by the force created by the observable mass. Therefore to make the equation work current theorists assume that there must be more mass than can be observed, hence dark matter. Secondly, the universe seems to be expanding at an accelerating pace. Same equation with an additional term showing a negative value on the left side of the equation reducing the force of gravity to account for the accelerating expansion rate since the equation would indicate that the gravitational force including dark matter should be slowing the expansion which apparently it is not.

Looking at the basic equation, the introduction of dark matter and dark energy seems to be a "variable correction factor" to make the equation balance. In other words-"Oops, the equation doesn't balance so let's add, subtract, multiply or divide our answer by an arbitrary number to get the right answer".

It would seem that looking at the equation above that one could account for the anomalies in observations and introduce a variable "Gravitational Constant"(sorry about the oxymoron) as a function of distance from the black hole that apparently exists at the center of each galaxy. It would seem to me with my laymen's knowledge that a larger Gravitational force near a black hole would account for dark matter while at the same time a weaker gravitational force at large distance from a black hole would explain dark energy. If nothing else, it would balance the equation as easily as introducing mysterious mass and energy that no one can seem to detect.