| ( | X | + | 1193523879 50 | ) | × | 1 200 | − | 12243511 100 | = | 3 50 | X | − | 22306287 100 |
| 方程左边 = | X | × | 1 200 | + | 1193523879 50 | × | 1 200 | − | 12243511 100 |
| = | X | × | 1 200 | + | 1193523879 10000 | − | 12243511 100 |
| = | 1 200 | X | − | 30827221 10000 |
1 200 | X | − | 30827221 10000 | = | 3 50 | X | − | 22306287 100 |
1 200 | X | − | 3 50 | X | = | - | 22306287 100 | + | 30827221 10000 |
| - | 11 200 | X | = | - | 22306287 100 | + | 30827221 10000 |