code: public Matrix solve(Matrix B)
      {
          //Solve  A x = L L^T x = b, for x 
          
          //First solve L y = b
          Matrix y = forwardSub(L, B);
          //Sole L^T x = y
          Matrix x = backSub(L, y);
          
          return x;
      }
docs: Solves the linear system of equations A x = B
  @param B the matrix of values
  @return the matrix c such that A x = B