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第1课时一元一次方程与二元一次方程的概念、解法和应用主要知识点一、概念、解法1.方程的有关概念(1)方程:含有未知数的等式叫做方程.(2)方程的解:使方程左右两边相等的未知数的值叫做方程的解;一元方程的解也叫做根.(3)解方程:求方程的解的过程叫解方程.2.一元一次方程:只含有一个未知数.并且未知数的次数是一的方程叫一元一次方程.
1st lesson time One-dimensional first-order equations and bivariate first-order equations Concepts, solutions and applications Key points of knowledge 1. Concepts, solutions 1. Related concepts of equations (1) Equations: Equations with unknowns are called equations. (2) Solutions to equations : The value of the equations that make the left and right sides of the equation equal is called the solution of the equation; the solution of the one-way equation is also called the root. (3) The solution equation: The process of solving the equation is called the solution equation. 2. The unary equation: contains only one unknown number. And the equation for which the number of unknowns is one is called a one-dimensional first-order equation.