| 70 | − | ( | 1 | − | x | ÷ | 1317343 100 | ) | × | 100 | × | 1 2 | = | 70 | − | ( | x | ÷ | 1317343 100 | − | 1 | ) | × | 100 | × | 1 |
| 方程左边 = | 70 | − | ( | 1 | − | x | ÷ | 1317343 100 | ) | × | 50 |
| 70 | − | ( | 1 | − | x | ÷ | 1317343 100 | ) | × | 50 | = | 70 | − | ( | x | ÷ | 1317343 100 | − | 1 | ) | × | 100 | × | 1 |
| 方程左边 = | 70 | − | 1 | × | 50 | + | x | ÷ | 1317343 100 | × | 50 |
| = | 70 | − | 50 | + | x | × | 5000 1317343 |
| = | 20 | + | 5000 1317343 | x |
| 20 | + | 5000 1317343 | x | = | 70 | − | ( | x | ÷ | 1317343 100 | − | 1 | ) | × | 100 | × | 1 |
| 方程右边 = | 70 | − | ( | x | ÷ | 1317343 100 | − | 1 | ) | × | 100 |
| 20 | + | 5000 1317343 | x | = | 70 | − | ( | x | ÷ | 1317343 100 | − | 1 | ) | × | 100 |
| 方程右边 = | 70 | − | x | ÷ | 1317343 100 | × | 100 | + | 1 | × | 100 |
| = | 70 | − | x | × | 10000 1317343 | + | 100 |
| = | 170 | − | 10000 1317343 | x |
| 20 | + | 5000 1317343 | x | = | 170 | − | 10000 1317343 | x |
5000 1317343 | x | + | 10000 1317343 | x | = | 170 | − | 20 |
15000 1317343 | x | = | 170 | − | 20 |
15000 1317343 | x | = | 150 |
| x | = | 150 | ÷ | 15000 1317343 |
| = | 150 | × | 1317343 15000 |
| = | 1 | × | 1317343 100 |
| x | = | 1317343 100 |
| x | = | 13173.43 |