3x＋5x－6=2－4x

X=____

    I was only nine years old when I learnt how to use a computer．My mother is my first teacher．I know how to type，how to copy a file，and how to visit a website on the Internet．One day，mom was not at home．I turned on the computer and began to learn how to chat on net．The first one I met there was a boy called Tom．He greeted me politely．When he knew that I was only a 9-year-old girl and almost knew nothing about chatting on net，he started showing me how to use the chatting tools，how to download，and how to send e-mails．I learnt a lot from him．

“乡间小路上，两辆汽车静静驶过，一切平安无事，它们对GDP的贡献很小。如果其中的一个司机由于疏忽而造成了一场恶性交通事故，随之而来的是救护车、医务人员、救援人员……撞坏的汽车还可能要进行修理。车祸虽然造成了很大的损失，但我们的GDP却增加了。”这段话告诉我们（  ）

下列措施中，为了减小摩擦的是(         )