| 300000 | = | ( | x | − | 26 | ) | × | 8 | × | 7 | × | 80 | + | ( | 3 2 | x | − | 35 | ) | × | 8 | × | 7 | × | 40 | + | ( | x | − | 26 | ) | × | 12 | × | 7 | × | 70 100 |
| 方程右边 = | ( | x | − | 26 | ) | × | 4480 | + | ( | 3 2 | x | − | 35 | ) | × | 2240 | + | ( | x | − | 26 | ) | × | 4704 | + | ( | 3 2 | x | − | 35 | ) | × | 252 5 | − | 713000 |
| 300000 | = | ( | x | − | 26 | ) | × | 4480 | + | ( | 3 2 | x | − | 35 | ) | × | 2240 | + | ( | x | − | 26 | ) | × | 4704 | + | ( | 3 2 | x | − | 35 | ) | × | 252 5 | − | 713000 |
| 方程右边 = | x | × | 4480 | − | 26 | × | 4480 | + | ( | 3 2 | x | − | 35 | ) | × | 2240 | + | ( | x | − | 26 | ) | × | 4704 | + | ( | 3 2 | x | − | 35 | ) | × | 252 5 | − | 713000 |
| = | x | × | 4480 | − | 116480 | + | ( | 3 2 | x | − | 35 | ) | × | 2240 | + | ( | x | − | 26 | ) | × | 4704 | + | ( | 3 2 | x | − | 35 | ) | × | 252 5 | − | 713000 |
| = | 4480 | x | − | 829480 | + | ( | 3 2 | x | − | 35 | ) | × | 2240 | + | ( | x | − | 26 | ) | × | 4704 | + | ( | 3 2 | x | − | 35 | ) | × | 252 5 |
| = | 4480 | x | − | 829480 | + | 3 2 | x | × | 2240 | − | 35 | × | 2240 | + | ( | x | − | 26 | ) | × | 4704 | + | ( | 3 2 | x | − | 35 | ) | × | 252 5 |
| = | 4480 | x | − | 829480 | + | 3360 | x | − | 78400 | + | ( | x | − | 26 | ) | × | 4704 | + | ( | 3 2 | x | − | 35 | ) | × | 252 5 |
| = | 7840 | x | − | 907880 | + | ( | x | − | 26 | ) | × | 4704 | + | ( | 3 2 | x | − | 35 | ) | × | 252 5 |
| = | 7840 | x | − | 907880 | + | x | × | 4704 | − | 26 | × | 4704 | + | ( | 3 2 | x | − | 35 | ) | × | 252 5 |
| = | 7840 | x | − | 907880 | + | x | × | 4704 | − | 122304 | + | ( | 3 2 | x | − | 35 | ) | × | 252 5 |
| = | 12544 | x | − | 1030184 | + | ( | 3 2 | x | − | 35 | ) | × | 252 5 |
| = | 12544 | x | − | 1030184 | + | 3 2 | x | × | 252 5 | − | 35 | × | 252 5 |
| = | 12544 | x | − | 1030184 | + | 378 5 | x | − | 1764 |
| = | 63098 5 | x | − | 1031948 |
| 300000 | = | 63098 5 | x | − | 1031948 |
| - | 63098 5 | x | = | - | 1031948 | − | 300000 |
| - | 63098 5 | x | = | - | 1331948 |
| 1331948 | = | 63098 5 | x |
63098 5 | x | = | 1331948 |
| x | = | 1331948 | ÷ | 63098 5 |
| = | 1331948 | × | 5 63098 |
| = | 665974 | × | 5 31549 |
| x | = | 3329870 31549 |
| x | = | 105.545976 |