code: public static void divideRowBy(Matrix matrix, long aRow, long fromCol, double value) {
  		long cols = matrix.getColumnCount();
  		for (long col = fromCol; col < cols; col++) {
  			matrix.setAsDouble(matrix.getAsDouble(aRow, col) / value, aRow, col);
  		}
  	}
docs: Divide the row from this column position by this value
  
  @param matrix
  the matrix to modify
  @param aRow
  the row to process
  @param fromCol
  starting from column
  @param value
  the value to divide