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“销售中的盈亏”是“一元一次方程的应用”的第一课时。学习列一元一次方程解决比较简单的应用题,重点讲解例1,并结合例1进行变式训练。
“P & L in Sales ” is the first class time of “Application of the Unary Equation ”. Study column a one-time equation to solve the relatively simple problem, focusing on Example 1, combined with Example 1 variant training.