| 984 | X | + | 160 | X | + | 35 | × | 12 | = | 1100 | X | + | 200 | + | 25 | × | 12 |
| 方程左边 = | 984 | X | + | 160 | X | + | 420 |
| = | 1144 | X | + | 420 |
| 1144 | X | + | 420 | = | 1100 | X | + | 200 | + | 25 | × | 12 |
| 方程右边 = | 1100 | X | + | 200 | + | 300 |
| = | 1100 | X | + | 500 |
| 1144 | X | + | 420 | = | 1100 | X | + | 500 |
| 1144 | X | − | 1100 | X | = | 500 | − | 420 |
| 44 | X | = | 500 | − | 420 |
| 44 | X | = | 80 |
| X | = | 80 | ÷ | 44 |
| = | 80 | × | 1 44 |
| = | 20 | × | 1 11 |
| X | = | 20 11 |
| X | = | 1.818182 |