// create the solver from A then add a A. The solver
// should be equivalent to one created from A_e
AdjustableLinearSolver adjSolver = new AdjLinearSolverQr();
assertTrue(adjSolver.setA(A));
adjSolver.addRowToA(row,insert);
// solve the system and see if it gets the expected solution
DenseMatrix64F X_found = RandomMatrices.createRandom(X.numRows,X.numCols,rand);
adjSolver.solve(Y,X_found);