1. Solve the equation according to the relationship between the parts in addition and subtraction. In addition, addend = and-another addend; In subtraction, the minuend = difference+subtraction. This method is suitable for simple one-dimensional linear equations. By observing the relationship between known number and unknown number in the equation, the value of unknown number can be obtained directly.

2. Solve the equation according to the relationship between the parts in the multiplication and division method. In multiplication, one factor = product/another factor; In division, dividend = quotient * divisor. This method is suitable for complex linear equations. By observing the relationship between known number and unknown number in the equation, the value of unknown number can be obtained directly.

3. Transform the equation. For example, the left and right sides of the equation add and subtract the same number at the same time, and the solution of the equation remains unchanged; The left and right sides of the equation are multiplied or divided by the same number that is not 0 at the same time, and the solution of the equation remains unchanged. This method is suitable for complex linear equations with one variable, and the equations can be simplified by deformation operation, which is easier to solve.

4. For multivariate linear equations with unknowns, they can be solved by substitution or elimination. For example, if you use the equation "2x=20-4", subtract 4 from both sides of the equation to get "2x= 16", and then divide both sides of the equation by 2 to get "x=8". This method is suitable for multivariate linear equations, and all unknown values can be obtained by substitution or elimination.

5. Test the obtained solution. When testing, we should first substitute the unknown values into the original equation to test whether the solution of the equation is correct; The second is to check whether the unknown values are consistent with the meaning of the question, discard those that are not, and keep the solutions that are consistent with the meaning of the question. This method can help us to judge whether the obtained solution is correct and effective.

Generally speaking, there are many methods to solve equations, and each method has its own applicable scenarios and conditions. But no matter which method is adopted, it is necessary to check whether the value of the unknown quantity meets the requirements of the topic, otherwise you may get the wrong answer.

At the same time, we should also pay attention to keep the logic clear in the process of solving problems to avoid mistakes. Only in this way can we really master the skills of solving equations and improve our mathematical ability.