Equations and solutions of equations:

Equation: An equation with an unknown number is called an equation. Note that the equation is an equation and contains unknowns, both of which are indispensable. Equations are different from arithmetic.

An arithmetic formula is a formula, which consists of an operation symbol and a known number, and it represents an unknown number.

An equation is an equation, and the unknowns in the equation can participate in the operation, and only if the unknowns are specific values.

The equation holds.

Solution of the equation: the value of the unknown that makes the left and right sides of the equation equal is called the solution of the equation.

1. An equation whose meaning contains an unknown number is called an equation.

There are two conditions for judging an equation: one is equality, and the other is that it contains unknowns.

2. The difference between the solution of the equation and the solution of the equation makes the left and right sides of the equation equal. The value of the unknown is called the solution of the equation.

The process of solving an equation is called solving an equation.

Simple equation is the learning content of the fifth unit of fifth grade mathematics in People's Education Press. The main contents that students need to master are: using letters to represent numbers, solving simple equations and solving problems with column equations.

Through the study of this unit, students can understand the method of expressing numbers by letters, understand the concept of equations, solve simple equations and solve some simple practical problems with equations.

Because the content of the equation is not only a simple understanding and learning in primary school, but also a key learning content in junior high school, students should seriously study the content of this unit from now on, not only to firmly grasp the content of this unit, but also to lay a solid foundation for learning the equation in the future.