13 2 | ÷ | 87 | − | 60 | ÷ | 1650 | + | X | ÷ | 126 | = | 77 50000 | ( | X | + | 133 2 | ) |
| 方程左边 = | 13 174 | − | 2 55 | + | X | × | 1 126 |
| = | 367 9570 | + | 1 126 | X |
367 9570 | + | 1 126 | X | = | 77 50000 | ( | X | + | 133 2 | ) |
| 方程右边 = | 77 50000 | X | + | 77 50000 | × | 133 2 |
| = | 77 50000 | X | + | 10241 100000 |
367 9570 | + | 1 126 | X | = | 77 50000 | X | + | 10241 100000 |
1 126 | X | − | 77 50000 | X | = | 10241 100000 | − | 367 9570 |
20149 3150000 | X | = | 10241 100000 | − | 367 9570 |
20149 3150000 | X | = | 6130637 95700000 |
| X | = | 6130637 95700000 | ÷ | 20149 3150000 |
| = | 6130637 95700000 | × | 3150000 20149 |
| = | 6130637 638 | × | 21 20149 |
| X | = | 128743377 12855062 |
| X | = | 10.014995 |