20671 5 | + | x | − | ( | 20671 5 | + | x | ) | × | 30 | ÷ | 200 | = | 5000 |
| 方程左边 = | 20671 5 | + | x | − | ( | 20671 5 | + | x | ) | × | 3 20 |
20671 5 | + | x | − | ( | 20671 5 | + | x | ) | × | 3 20 | = | 5000 |
| 方程左边 = | 20671 5 | + | x | − | 20671 5 | × | 3 20 | − | x | × | 3 20 |
| = | 20671 5 | + | x | − | 62013 100 | − | x | × | 3 20 |
| = | 351407 100 | + | 17 20 | x |
351407 100 | + | 17 20 | x | = | 5000 |
17 20 | x | = | 5000 | − | 351407 100 |
17 20 | x | = | 148593 100 |
| x | = | 148593 100 | ÷ | 17 20 |
| = | 148593 100 | × | 20 17 |
| = | 148593 5 | × | 1 17 |
| x | = | 148593 85 |
| x | = | 1748.152941 |