| 15 | ÷ | 1000 | + | 121 100 | ( | x | + | 9 5 | ) | = | 3317 10000 | ( | x | x | − | 9 5 | × | 9 5 | ) | ( | x | + | 9 5 | ) |
| 方程左边 = | 3 200 | + | 121 100 | ( | x | + | 9 5 | ) |
3 200 | + | 121 100 | ( | x | + | 9 5 | ) | = | 3317 10000 | ( | x | x | − | 9 5 | × | 9 5 | ) | ( | x | + | 9 5 | ) |
| 方程左边 = | 3 200 | + | 121 100 | x | + | 121 100 | × | 9 5 |
| = | 3 200 | + | 121 100 | x | + | 1089 500 |
| = | 2193 1000 | + | 121 100 | x |
2193 1000 | + | 121 100 | x | = | 3317 10000 | ( | x | x | − | 9 5 | × | 9 5 | ) | ( | x | + | 9 5 | ) |
| 方程右边 = | 3317 10000 | x | x | ( | x | + | 9 5 | ) | − | 3317 10000 | × | 9 5 | × | 9 5 | ( | x | + | 9 5 | ) |
| = | 3317 10000 | x | x | ( | x | + | 9 5 | ) | − | 268677 250000 | ( | x | + | 9 5 | ) |
| = | 3317 10000 | x | x | x | + | 3317 10000 | x | x | × | 9 5 | − | 268677 250000 | ( | x | + | 9 5 | ) |
| = | 3317 10000 | x | x | x | + | 29853 50000 | x | x | − | 268677 250000 | ( | x | + | 9 5 | ) |
| = | 3317 10000 | x | x | x | + | 29853 50000 | x | x | − | 268677 250000 | x | − | 268677 250000 | × | 9 5 |
| = | 3317 10000 | x | x | x | + | 29853 50000 | x | x | − | 268677 250000 | x | − | 2418093 1250000 |
2193 1000 | + | 121 100 | x | = | 3317 10000 | x | x | x | + | 29853 50000 | x | x | − | 268677 250000 | x | − | 2418093 1250000 |