| ( | 14000 | + | X | ) | ÷ | 12 | + | ( | 14000 | + | X | ) | = | 63000 |
| 方程左边 = | 14000 | × | 1 12 | + | X | × | 1 12 | + | ( | 14000 | + | X | ) |
| = | 3500 3 | + | X | × | 1 12 | + | ( | 14000 | + | X | ) |
| = | 3500 3 | + | 1 12 | X | + | 14000 | + | X |
| = | 45500 3 | + | 13 12 | X |
45500 3 | + | 13 12 | X | = | 63000 |
13 12 | X | = | 63000 | − | 45500 3 |
13 12 | X | = | 143500 3 |
| X | = | 143500 3 | ÷ | 13 12 |
| = | 143500 3 | × | 12 13 |
| = | 143500 | × | 4 13 |
| X | = | 574000 13 |
| X | = | 44153.846154 |