Definition: An equation containing unknown numbers is called an equation

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

Definition: It contains only one unknown number (element), and the degree of the unknown number is 1. Such an equation is called a linear equation of one variable.

Remove the denominator: multiply both sides of the equation by the least common multiple of the denominator

Remove brackets: Be careful not to multiply the sum symbol

linear equation of one variable

Move item: Change the sign when moving item

Merger of similar items

The coefficient is reduced to 1: the coefficient of dividing the time between both sides by the sigmoid

review: examine the question

Assume: Assume unknown number

Column: Find equations of equivalence relationship series

Solution: Solve the equation

Answer: Write the answer