| ( | 331 | ÷ | 550 | × | 1644 | X | ) | − | ( | 270 | X | ) | + | ( | 270 | X | ) | = | 1100 |
| 方程左边 = | 331 | ÷ | 550 | × | 1644 | X | − | ( | 270 | X | ) | + | ( | 270 | X | ) |
| = | 272082 275 | X | − | ( | 270 | X | ) | + | ( | 270 | X | ) |
| = | 272082 275 | X | − | 270 | X | + | ( | 270 | X | ) |
| = | 197832 275 | X | + | ( | 270 | X | ) |
| = | 197832 275 | X | + | 270 | X |
| = | 272082 275 | X |
272082 275 | X | = | 1100 |
| X | = | 1100 | ÷ | 272082 275 |
| = | 1100 | × | 275 272082 |
| = | 550 | × | 275 136041 |
| X | = | 151250 136041 |
| X | = | 1.111797 |