| x | = | 247 4 | × | 4 | × | 1091 1000 | × | 17 20 | − | ( | 80 | − | 3349 100 | ) | ( | 247 | ÷ | 10217 20 | ) |
| 方程右边 = | 4581109 20000 | − | ( | 80 | − | 3349 100 | ) | ( | 247 | ÷ | 10217 20 | ) |
| x | = | 4581109 20000 | − | ( | 80 | − | 3349 100 | ) | ( | 247 | ÷ | 10217 20 | ) |
| 方程右边 = | 4581109 20000 | − | 80 | ( | 247 | ÷ | 10217 20 | ) | + | 3349 100 | ( | 247 | ÷ | 10217 20 | ) |
| = | 4581109 20000 | − | 80 | × | 247 | ÷ | 10217 20 | + | 3349 100 | ( | 247 | ÷ | 10217 20 | ) |
| = | 4581109 20000 | − | 395200 10217 | + | 3349 100 | ( | 247 | ÷ | 10217 20 | ) |