| 10 | x | × | 7 | = | x | − | x | ÷ | 113 100 | × | 1 20 | + | 4 |
| 方程左边 = | 70 | x |
| 70 | x | = | x | − | x | ÷ | 113 100 | × | 1 20 | + | 4 |
| 方程右边 = | x | − | x | × | 5 113 | + | 4 |
| = | 108 113 | x | + | 4 |
| 70 | x | = | 108 113 | x | + | 4 |
| 70 | x | − | 108 113 | x | = | 4 |
7802 113 | x | = | 4 |
| x | = | 4 | ÷ | 7802 113 |
| = | 4 | × | 113 7802 |
| = | 2 | × | 113 3901 |
| x | = | 226 3901 |
| x | = | 0.057934 |