Seems like this would be better on math.stackexchange.com.
Linear equations is solved by using the "Solve Linear System" option under the numeric solver. However, attempting to enter the variable A for the first coefficient will cause a "Bad Argument Type" error to be displayed. This is because the linear system solver is designed to solve problems numerically, not symbolically.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.