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初学方程时,同学们要注意理解和掌握以下几个与方程有关的问题. 一、理解等式有关性质应分清的几个问题1.等式和方程的联系与区别等式和方程是两个根本不同的概念.等式是表示相等关系的式子,比如4+7=3+8,这是等式而不是方程,方程是含有未知数的等式.就是说,判断一个式子是不是方程,必须具备两个要素:(1)方程是属于等式的范畴;(2)这个等式中含有未知数.比如3x+7=7x-6,就满足这两个要素,所
When learning equations, students should pay attention to understanding and mastering the following questions relating to the equations. First, understand several issues concerning the nature of equations that should be distinguished 1. Relation and difference between equations and equations Equations and equations are two A fundamentally different concept. An equation is an equation that expresses an equal relationship, such as 4+7=3+8. This is an equation and not an equation. An equation is an equation containing an unknown. That is, whether or not a formula is an equation There must be two elements: (1) the equation belongs to the category of the equation; (2) the equation contains an unknown number. For example, 3x+7=7x-6, which satisfies these two factors,