9 10 | × | 657 25 | × | 390 | × | 60 | + | 377 20 | × | 390 | ( | x | − | 60 | ) | = | - | ( | 509 | × | 640 | ( | 5 4 | x | − | 195 | ) | ) | ÷ | ( | 5 4 | x | ) | + | 459 | × | 764 | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | ÷ | ( | 5 4 | x | ) | − | 20 | ( | 509 | + | 764 | ) |
| 方程两边同时乘以: | ( | 5 4 | x | ) |
9 10 | × | 657 25 | × | 390 | × | 60 | ( | 5 4 | x | ) | + | 377 20 | × | 390 | ( | x | − | 60 | ) | ( | 5 4 | x | ) | = | - | ( | 509 | × | 640 | ( | 5 4 | x | − | 195 | ) | ) | + | 459 | × | 764 | ( | 5 4 | x | ) | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
9 10 | × | 657 25 | × | 390 | × | 60 | × | 5 4 | x | + | 377 20 | × | 390 | ( | x | − | 60 | ) | ( | 5 4 | x | ) | = | - | ( | 509 | × | 640 | ( | 5 4 | x | − | 195 | ) | ) | + | 459 | × | 764 | ( | 5 4 | x | ) | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
9 10 | × | 657 25 | × | 390 | × | 60 | × | 5 4 | x | + | 377 20 | × | 390 | ( | x | − | 60 | ) | ( | 5 4 | x | ) | = | - | 509 | × | 640 | ( | 5 4 | x | − | 195 | ) | + | 459 | × | 764 | ( | 5 4 | x | ) | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
| 691821 | x | + | 14703 2 | ( | x | − | 60 | ) | ( | 5 4 | x | ) | = | - | 325760 | ( | 5 4 | x | − | 195 | ) | + | 350676 | ( | 5 4 | x | ) | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
| 691821 | x | + | 14703 2 | x | ( | 5 4 | x | ) | − | 14703 2 | × | 60 | ( | 5 4 | x | ) | = | - | 325760 | ( | 5 4 | x | − | 195 | ) | + | 350676 | ( | 5 4 | x | ) | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
| 691821 | x | + | 14703 2 | x | ( | 5 4 | x | ) | − | 14703 2 | × | 60 | ( | 5 4 | x | ) | = | - | 325760 | × | 5 4 | x | + | 325760 | × | 195 | + | 350676 | ( | 5 4 | x | ) | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
| 691821 | x | + | 14703 2 | x | ( | 5 4 | x | ) | − | 441090 | ( | 5 4 | x | ) | = | - | 407200 | x | + | 63523200 | + | 350676 | ( | 5 4 | x | ) | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
| 691821 | x | + | 14703 2 | x | × | 5 4 | x | − | 441090 | ( | 5 4 | x | ) | = | - | 407200 | x | + | 63523200 | + | 350676 | ( | 5 4 | x | ) | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
| 691821 | x | + | 14703 2 | x | × | 5 4 | x | − | 441090 | ( | 5 4 | x | ) | = | - | 407200 | x | + | 63523200 | + | 350676 | × | 5 4 | x | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
| 691821 | x | + | 73515 8 | x | x | − | 441090 | ( | 5 4 | x | ) | = | - | 407200 | x | + | 63523200 | + | 438345 | x | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
| 691821 | x | + | 73515 8 | x | x | − | 441090 | ( | 5 4 | x | ) | = | 31145 | x | + | 63523200 | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
| 691821 | x | + | 73515 8 | x | x | − | 441090 | × | 5 4 | x | = | 31145 | x | + | 63523200 | − | ( | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
| 691821 | x | + | 73515 8 | x | x | − | 441090 | × | 5 4 | x | = | 31145 | x | + | 63523200 | − | 509 | × | 640 | ( | 5 4 | x | − | 87 | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
| 691821 | x | + | 73515 8 | x | x | − | 1102725 2 | x | = | 31145 | x | + | 63523200 | − | 325760 | ( | 5 4 | x | − | 87 | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
280917 2 | x | + | 73515 8 | x | x | = | 31145 | x | + | 63523200 | − | 325760 | ( | 5 4 | x | − | 87 | ) | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
280917 2 | x | + | 73515 8 | x | x | = | 31145 | x | + | 63523200 | − | 325760 | × | 5 4 | x | + | 325760 | × | 87 | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
280917 2 | x | + | 73515 8 | x | x | = | 31145 | x | + | 63523200 | − | 407200 | x | + | 28341120 | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
280917 2 | x | + | 73515 8 | x | x | = | - | 376055 | x | + | 91864320 | − | 20 | ( | 509 | + | 764 | ) | ( | 5 4 | x | ) |
280917 2 | x | + | 73515 8 | x | x | = | - | 376055 | x | + | 91864320 | − | 20 | × | 509 | ( | 5 4 | x | ) | − | 20 | × | 764 | ( | 5 4 | x | ) |
280917 2 | x | + | 73515 8 | x | x | = | - | 376055 | x | + | 91864320 | − | 10180 | ( | 5 4 | x | ) | − | 15280 | ( | 5 4 | x | ) |
280917 2 | x | + | 73515 8 | x | x | = | - | 376055 | x | + | 91864320 | − | 10180 | × | 5 4 | x | − | 15280 | ( | 5 4 | x | ) |
280917 2 | x | + | 73515 8 | x | x | = | - | 376055 | x | + | 91864320 | − | 12725 | x | − | 15280 | ( | 5 4 | x | ) |
280917 2 | x | + | 73515 8 | x | x | = | - | 388780 | x | + | 91864320 | − | 15280 | ( | 5 4 | x | ) |
280917 2 | x | + | 73515 8 | x | x | = | - | 388780 | x | + | 91864320 | − | 15280 | × | 5 4 | x |
280917 2 | x | + | 73515 8 | x | x | = | - | 388780 | x | + | 91864320 | − | 19100 | x |