703 1000 | x | + | ( | 1 | − | x | ) | × | 713 1000 | = | 709 1000 |
| 方程左边 = | 703 1000 | x | + | 1 | × | 713 1000 | − | x | × | 713 1000 |
| = | 703 1000 | x | + | 713 1000 | − | x | × | 713 1000 |
| = | - | 1 100 | x | + | 713 1000 |
| - | 1 100 | x | + | 713 1000 | = | 709 1000 |
| - | 1 100 | x | = | 709 1000 | − | 713 1000 |
| - | 1 100 | x | = | - | 1 250 |
1 250 | = | 1 100 | x |
1 100 | x | = | 1 250 |
| x | = | 1 250 | ÷ | 1 100 |
| = | 1 250 | × | 100 |
| = | 1 5 | × | 2 |
| x | = | 2 5 |
| x | = | 0.4 |