1 10 | x | + | ( | x | × | 21 20 | + | 100 | ) | + | 3 20 | x | + | ( | 1 10 | x | × | 207 1250 | ) | = | 149813 100 |
| 方程左边 = | 1 4 | x | + | ( | x | × | 21 20 | + | 100 | ) | + | ( | 1 10 | x | × | 207 1250 | ) |
1 4 | x | + | ( | x | × | 21 20 | + | 100 | ) | + | ( | 1 10 | x | × | 207 1250 | ) | = | 149813 100 |
| 方程左边 = | 1 4 | x | + | x | × | 21 20 | + | 100 | + | ( | 1 10 | x | × | 207 1250 | ) |
| = | 13 10 | x | + | 100 | + | ( | 1 10 | x | × | 207 1250 | ) |
| = | 13 10 | x | + | 100 | + | 1 10 | x | × | 207 1250 |
| = | 13 10 | x | + | 100 | + | 207 12500 | x |
| = | 16457 12500 | x | + | 100 |
16457 12500 | x | + | 100 | = | 149813 100 |
16457 12500 | x | = | 149813 100 | − | 100 |
16457 12500 | x | = | 139813 100 |
| x | = | 139813 100 | ÷ | 16457 12500 |
| = | 139813 100 | × | 12500 16457 |
| = | 139813 | × | 125 16457 |
| x | = | 17476625 16457 |
| x | = | 1061.956918 |