| 118240 | + | 118240 | X | + | ( | ( | 118240 | + | 118240 | X | ) | × | 9 100 | ) | = | 135000 |
| 方程左边 = | 118240 | + | 118240 | X | + | ( | 118240 | + | 118240 | X | ) | × | 9 100 |
| = | 118240 | + | 118240 | X | + | 118240 | × | 9 100 | + | 118240 | X | × | 9 100 |
| = | 118240 | + | 118240 | X | + | 53208 5 | + | 53208 5 | X |
| = | 644408 5 | + | 644408 5 | X |
644408 5 | + | 644408 5 | X | = | 135000 |
644408 5 | X | = | 135000 | − | 644408 5 |
644408 5 | X | = | 30592 5 |
| X | = | 30592 5 | ÷ | 644408 5 |
| = | 30592 5 | × | 5 644408 |
| = | 3824 | × | 1 80551 |
| X | = | 3824 80551 |
| X | = | 0.047473 |