121 100 | = | 157 200 | ( | x | x | − | 33 20 | × | 33 20 | ) | × | 2113 5000 | − | ( | 16 | × | 1 500 | ) | ÷ | 2 | × | ( | x | + | 33 20 | ) |
| 方程右边 = | 331741 1000000 | ( | x | x | − | 33 20 | × | 33 20 | ) | − | ( | 16 | × | 1 500 | ) | × | 1 2 | ( | x | + | 33 20 | ) |
121 100 | = | 331741 1000000 | ( | x | x | − | 33 20 | × | 33 20 | ) | − | ( | 16 | × | 1 500 | ) | × | 1 2 | ( | x | + | 33 20 | ) |
| 方程右边 = | 331741 1000000 | x | x | − | 331741 1000000 | × | 33 20 | × | 33 20 | − | ( | 16 | × | 1 500 | ) | × | 1 2 | ( | x | + | 33 20 | ) |
| = | 331741 1000000 | x | x | − | 361265949 400000000 | − | ( | 16 | × | 1 500 | ) | × | 1 2 | ( | x | + | 33 20 | ) |
| = | 331741 1000000 | x | x | − | 361265949 400000000 | − | 16 | × | 1 500 | × | 1 2 | ( | x | + | 33 20 | ) |
| = | 331741 1000000 | x | x | − | 361265949 400000000 | − | 2 125 | ( | x | + | 33 20 | ) |
| = | 331741 1000000 | x | x | − | 361265949 400000000 | − | 2 125 | x | − | 2 125 | × | 33 20 |
| = | 331741 1000000 | x | x | − | 361265949 400000000 | − | 2 125 | x | − | 33 1250 |