学习一元一次方程,正确地理解方程及其解的相关概念非常重要,下面就请陈老师带大家看一看.含有未知数的等式叫做方程.方程必须具备两个条件:首先必须含有未知数,其次必须是一个等式.例1判断下列各式是不是方程.(1)3t-1≠1-t.(2)2-(-3)=-1+6.(3)y~2+2y=4y-4.(4)3x-y=0.(5)3x+7.(6)x=2.解析:(1)不是方程,因为它不是等式.(2)不是方程,因为它不含未知数.(3)是方程.(4)是方程.(5)不是方程,因为它不是等式.(6)是方程. Learning a one-time equation, the correct understanding of the concept of equations and their solutions is very important, following the teacher Chen took everyone to take a look at. Equations with unknowns called the equation. Equation must have two conditions: first of all must contain unknowns, followed by (1) 3t-1 ≠ 1-t (2) 2 - (- 3) = - 1 + 6 (3) y ~ 2 + 2y (4) 3x-y = 0. (5) 3x + 7. (6) x = 2. Analyze: (1) It is not an equation because it is not an equation. (2) It is not an equation because it (3) is the equation (4) is the equation (5) is not an equation because it is not an equation (6) is an equation.