1. Move 15 to the right of the equal sign.

-x=2- 15

2. Calculate subtraction.

-x=- 13

3. remove the negative sign of X.

x= 13

One-dimensional linear equation is the simplest equation, and the process of solving the equation is relatively simple.

An equation must be an equation, but an equation is not necessarily an equation.

The basis of solving equations:

Moving items and changing symbols: moving some items in the equation from one side of the equation to the other side of the previous symbol, and adding, subtracting, multiplying and dividing.

Steps to solve the equation:

Method 1: 1, calculate if you can; 2. Transform-Calculation-Result.

Method 2: 2. From the beginning to the end, when there is only one number left, calculate it directly.

Information about production expansion:

By solving the equation, we can avoid the difficulty of reverse thinking and directly list the equations with the quantity to be solved. There are many forms of equations, such as one-dimensional linear equation, two-dimensional linear equation, one-dimensional quadratic equation and so on. , can also be combined into equations to solve multiple unknowns.

In mathematics, an equation is a statement containing one or more variables. Solving an equation involves determining which variables have values that make the equation valid. Variables are also called unknowns, and the value of the unknowns satisfying the equation is called the solution of the equation.

Baidu Encyclopedia-Equation