This is my family ____.

已知|a|=8，|b|=6且a+b＜0，求2a﹣b的值．

阅读下面这首诗，完成小题。
                                                                                                        春游湖
                                                                                                     【宋】 徐俯
                                                                                       双飞燕子几时回？夹岸桃花蘸①水开。
                                                                                       春雨断桥人不度，小舟撑出绿阴来。
      【注释】①蘸：沾着水面。