| x | + | 50 | × | 8 | × | 1 500 | + | x | × | 3 200 | + | x | × | 10 100 | + | ( | x | + | x | × | 10 100 | ) | × | 13 100 | = | 0 |
| 方程左边 = | x | + | 4 5 | + | x | × | 3 200 | + | x | × | 10 100 | + | ( | x | + | x | × | 10 100 | ) | × | 13 100 |
| = | 223 200 | x | + | 4 5 | + | ( | x | + | x | × | 10 100 | ) | × | 13 100 |
223 200 | x | + | 4 5 | + | ( | x | + | x | × | 10 100 | ) | × | 13 100 | = | 0 |
| 方程左边 = | 223 200 | x | + | 4 5 | + | x | × | 13 100 | + | x | × | 10 100 | × | 13 100 |
| = | 223 200 | x | + | 4 5 | + | x | × | 13 100 | + | x | × | 13 1000 |
| = | 629 500 | x | + | 4 5 |
629 500 | x | + | 4 5 | = | 0 |
629 500 | x | = | 0 | − | 4 5 |
629 500 | x | = | - | 4 5 |
| x | = | - | 4 5 | ÷ | 629 500 |
| = | - | 4 5 | × | 500 629 |
| = | - | 4 | × | 100 629 |
| x | = | - | 400 629 |
| x | = | - 0.63593 |