119 10 | × | 300 | × | 176 5 | = | 215 | x | + | 300 | × | 763 |
| 方程左边 = | 125664 |
| 125664 | = | 215 | x | + | 300 | × | 763 |
| 方程右边 = | 215 | x | + | 228900 |
| 125664 | = | 215 | x | + | 228900 |
| - | 215 | x | = | 228900 | − | 125664 |
| - | 215 | x | = | 103236 |
| - | 103236 | = | 215 | x |
| 215 | x | = | - | 103236 |
| x | = | - | 103236 | ÷ | 215 |
| = | - | 103236 | × | 1 215 |
| x | = | - | 103236 215 |
| x | = | - 480.167442 |