| ( | x | ÷ | 7811 100 | ) | ÷ | ( | x | ÷ | 7811 100 | + | ( | 1 | − | x | ) | ÷ | 9213 100 | ) | = | 11 200 |
| 方程两边同时乘以: | ( | x | ÷ | 7811 100 | + | ( | 1 | − | x | ) | ÷ | 9213 100 | ) |
| ( | x | ÷ | 7811 100 | ) | = | 11 200 | ( | x | ÷ | 7811 100 | + | ( | 1 | − | x | ) | ÷ | 9213 100 | ) |
| x | ÷ | 7811 100 | = | 11 200 | ( | x | ÷ | 7811 100 | + | ( | 1 | − | x | ) | ÷ | 9213 100 | ) |
| x | ÷ | 7811 100 | = | 11 200 | x | ÷ | 7811 100 | + | 11 200 | ( | 1 | − | x | ) | ÷ | 9213 100 |
| x | × | 100 7811 | = | 11 15622 | x | + | 11 18426 | ( | 1 | − | x | ) |
100 7811 | x | = | 11 15622 | x | + | 11 18426 | × | 1 | − | 11 18426 | x |
100 7811 | x | = | 11 15622 | x | + | 11 18426 | − | 11 18426 | x |
100 7811 | x | = | 7711 71962743 | x | + | 11 18426 |
100 7811 | x | − | 7711 71962743 | x | = | 11 18426 |