1 10 | x | + | ( | x | × | 21 20 | + | 150 | ) | + | 3 20 | x | + | ( | 1 10 | x | × | 331 2000 | ) | = | 6591 4 |
| 方程左边 = | 1 4 | x | + | ( | x | × | 21 20 | + | 150 | ) | + | ( | 1 10 | x | × | 331 2000 | ) |
1 4 | x | + | ( | x | × | 21 20 | + | 150 | ) | + | ( | 1 10 | x | × | 331 2000 | ) | = | 6591 4 |
| 方程左边 = | 1 4 | x | + | x | × | 21 20 | + | 150 | + | ( | 1 10 | x | × | 331 2000 | ) |
| = | 13 10 | x | + | 150 | + | ( | 1 10 | x | × | 331 2000 | ) |
| = | 13 10 | x | + | 150 | + | 1 10 | x | × | 331 2000 |
| = | 13 10 | x | + | 150 | + | 331 20000 | x |
| = | 26331 20000 | x | + | 150 |
26331 20000 | x | + | 150 | = | 6591 4 |
26331 20000 | x | = | 6591 4 | − | 150 |
26331 20000 | x | = | 5991 4 |
| x | = | 5991 4 | ÷ | 26331 20000 |
| = | 5991 4 | × | 20000 26331 |
| = | 1997 | × | 5000 8777 |
| x | = | 9985000 8777 |
| x | = | 1137.632448 |