| 115 | × | 3 2 | ( | 63 100 | ( | x | − | 43 100 | ) | − | 63 100 | × | 63 100 | ÷ | 2 | ) | ( | 1 | + | 3 50 | x | ) | = | 90 | ( | 21 10 | − | x | − | 1 2 | ) | ( | 1 | − | 1 10 | x | + | 1 4 | ) |
| 方程左边 = | 345 2 | ( | 63 100 | ( | x | − | 43 100 | ) | − | 63 100 | × | 63 100 | ÷ | 2 | ) | ( | 1 | + | 3 50 | x | ) |
345 2 | ( | 63 100 | ( | x | − | 43 100 | ) | − | 63 100 | × | 63 100 | ÷ | 2 | ) | ( | 1 | + | 3 50 | x | ) | = | 90 | ( | 21 10 | − | x | − | 1 2 | ) | ( | 1 | − | 1 10 | x | + | 1 4 | ) |
| 方程左边 = | 345 2 | × | 63 100 | ( | x | − | 43 100 | ) | ( | 1 | + | 3 50 | x | ) | − | 345 2 | × | 63 100 | × | 63 100 | ÷ | 2 | × | ( | 1 | + | 3 50 | x | ) |
| = | 4347 40 | ( | x | − | 43 100 | ) | ( | 1 | + | 3 50 | x | ) | − | 273861 8000 | ( | 1 | + | 3 50 | x | ) |
| = | 4347 40 | x | ( | 1 | + | 3 50 | x | ) | − | 4347 40 | × | 43 100 | ( | 1 | + | 3 50 | x | ) | − | 273861 8000 | ( | 1 | + | 3 50 | x | ) |
| = | 4347 40 | x | ( | 1 | + | 3 50 | x | ) | − | 186921 4000 | ( | 1 | + | 3 50 | x | ) | − | 273861 8000 | ( | 1 | + | 3 50 | x | ) |
| = | 4347 40 | x | × | 1 | + | 4347 40 | x | × | 3 50 | x | − | 186921 4000 | ( | 1 | + | 3 50 | x | ) | − | 273861 8000 | ( | 1 | + | 3 50 | x | ) |
| = | 4347 40 | x | + | 13041 2000 | x | x | − | 186921 4000 | ( | 1 | + | 3 50 | x | ) | − | 273861 8000 | ( | 1 | + | 3 50 | x | ) |
| = | 4347 40 | x | + | 13041 2000 | x | x | − | 186921 4000 | × | 1 | − | 186921 4000 | × | 3 50 | x | − | 273861 8000 | ( | 1 | + | 3 50 | x | ) |
| = | 4347 40 | x | + | 13041 2000 | x | x | − | 186921 4000 | − | 560763 200000 | x | − | 273861 8000 | ( | 1 | + | 3 50 | x | ) |
| = | 21174237 200000 | x | + | 13041 2000 | x | x | − | 186921 4000 | − | 273861 8000 | ( | 1 | + | 3 50 | x | ) |
| = | 21174237 200000 | x | + | 13041 2000 | x | x | − | 186921 4000 | − | 273861 8000 | × | 1 | − | 273861 8000 | × | 3 50 | x |
| = | 21174237 200000 | x | + | 13041 2000 | x | x | − | 186921 4000 | − | 273861 8000 | − | 821583 400000 | x |