题目

       One morning more than thirty years ago, I entered the Track Kitchen, a restaurant where everyone from the humblest（卑微的）to the most powerful came for breakfast．I noticed an empty chair next to an elderly, unshaven man, who looked somewhat disheveled．He was wearing a worn-out hat and was alone．I asked if I might join him．He agreed quietly and I sat down to have my breakfast．        We cautiously began a conversation and spoke about a wide rang of things．We never introduced ourselves．I was concerned that he might have no money and not be able to afford s解方程：（1）x2+2x=1；（2）x（x+1）-（x+1）=0．