| 0 | = | 70 100 | − | 15 100 | − | ( | 1 | − | 10 100 | ) | ÷ | 10 100 | × | 8 100 | ( | 1 | − | x | ) |
| 方程右边 = | 70 100 | − | 15 100 | − | ( | 1 | − | 10 100 | ) | × | 4 5 | ( | 1 | − | x | ) |
| = | 11 20 | − | ( | 1 | − | 10 100 | ) | × | 4 5 | ( | 1 | − | x | ) |
| 0 | = | 11 20 | − | ( | 1 | − | 10 100 | ) | × | 4 5 | ( | 1 | − | x | ) |
| 方程右边 = | 11 20 | − | 1 | × | 4 5 | ( | 1 | − | x | ) | + | 10 100 | × | 4 5 | ( | 1 | − | x | ) |
| = | 11 20 | − | 4 5 | ( | 1 | − | x | ) | + | 2 25 | ( | 1 | − | x | ) |
| = | 11 20 | − | 4 5 | × | 1 | + | 4 5 | x | + | 2 25 | ( | 1 | − | x | ) |
| = | 11 20 | − | 4 5 | + | 4 5 | x | + | 2 25 | ( | 1 | − | x | ) |
| = | - | 1 4 | + | 4 5 | x | + | 2 25 | ( | 1 | − | x | ) |
| = | - | 1 4 | + | 4 5 | x | + | 2 25 | × | 1 | − | 2 25 | x |
| = | - | 1 4 | + | 4 5 | x | + | 2 25 | − | 2 25 | x |
| = | - | 17 100 | + | 18 25 | x |
| 0 | = | - | 17 100 | + | 18 25 | x |
| - | 18 25 | x | = | - | 17 100 | − | 0 |
| - | 18 25 | x | = | - | 17 100 |
17 100 | = | 18 25 | x |
18 25 | x | = | 17 100 |
| x | = | 17 100 | ÷ | 18 25 |
| = | 17 100 | × | 25 18 |
| = | 17 4 | × | 1 18 |
| x | = | 17 72 |
| x | = | 0.236111 |