2. Remove the brackets: first remove the brackets, then remove the brackets, and finally remove the braces;
3. Move the term: move all terms containing unknowns to one side of the equation, and all other terms to the other side of the equation; 4. Merge similar terms: transform the equation into ax = b (a ≠ 0);
5. Coefficient division 1: divide the unknown coefficient a on both sides of the equation to get the solution of equation x = b/a. 。
Homotopy equation
If the solutions of two equations are the same, then these two equations are called homosolution equations.
The same solution principle of the equation;
Adding or subtracting the same number or the same equation on both sides of the equation is the same solution equation as the original equation.
2. The equation obtained by multiplying or dividing the same number whose two sides are not zero is the same as the original equation.
An important method to solve the application problem of linear equation with one variable;
1. Examine the questions carefully.
Analysis of known and unknown quantities.
3. Find a suitable equivalence relation.
4. Set a suitable unknown.
5. List reasonable equations.
Solve equations.
⒎ test
⒏ Write down the answers (organize your own language)