The method of solving equations by fractions: 1. The first step is usually to remove the brackets. If there are no brackets, please go to the second part.

2. The second step is to multiply the common denominator to round it off.

3. The third step is to merge.

Step four, get the result.

Solve binary linear equations. The idea is elimination. According to the characteristics of the equation, it can be determined whether to eliminate by generation or by addition and subtraction.

If the coefficient of an unknown in an equation is 1, the generation elimination method is commonly used, and the addition and subtraction elimination method can also be used; If the coefficients of the same unknown in two equations are equal, or the opposite, or an integer multiple, of course, the method of addition, subtraction and elimination is used.