| ( | X | + | 451 50 | + | 439 50 | + | 947 100 | ) | ÷ | 4 | = | X |
| 方程左边 = | X | × | 1 4 | + | 451 50 | × | 1 4 | + | 439 50 | × | 1 4 | + | 947 100 | × | 1 4 |
| = | X | × | 1 4 | + | 451 200 | + | 439 200 | + | 947 400 |
| = | 1 4 | X | + | 2727 400 |
1 4 | X | + | 2727 400 | = | X |
1 4 | X | − | X | = | - | 2727 400 |
| - | 3 4 | X | = | - | 2727 400 |
2727 400 | = | 3 4 | X |
3 4 | X | = | 2727 400 |
| X | = | 2727 400 | ÷ | 3 4 |
| = | 2727 400 | × | 4 3 |
| = | 909 100 | × | 1 |
| X | = | 909 100 |
| X | = | 9.09 |