在列一元一次方程解决实际问题的过程中,若能根据题意选准工具,则能迅速突破难点,列出方程,从而解决问题.本文介绍此类问题的四大常用工具,供同学们解题时参考.一、示意图1.线段图例1一次远足活动中,一部分人步行,另一部分乘一辆汽车,两部分人同地出发.步行者比汽车提前1小时出发,这辆汽车到达目的地后,再回头接步行这部分人.出发地到目的地的距离是60千米.已知步行的速度是5 In the process of solving the real problem by solving the linear equation of the first order, if we choose the right tool according to the question, we can quickly break through the difficulty, list the equation and solve the problem.This paper introduces four commonly used tools of this kind of question, 1, sketch map 1. Line Figure 1 A hiking activity, some people walk, and the other part by a car, two people starting on the same ground.The walkers set off 1 hour earlier than the car, the car reached its destination After that, go back and walk this part of the people. The distance from the starting point to the destination is 60 km. Known walking speed is 5