| x | ÷ | 87 | ÷ | ( | 15 | ÷ | 100 | + | 20 | ÷ | 1650 | ) | ÷ | ( | x | + | 693 10 | ) | = | 2 |
| 方程两边同时乘以: | ( | 15 | ÷ | 100 | + | 20 | ÷ | 1650 | ) |
| x | ÷ | 87 | ÷ | ( | x | + | 693 10 | ) | = | 2 | ( | 15 | ÷ | 100 | + | 20 | ÷ | 1650 | ) |
| x | ÷ | 87 | ÷ | ( | x | + | 693 10 | ) | = | 2 | × | 15 | ÷ | 100 | + | 2 | × | 20 | ÷ | 1650 |
| x | × | 1 87 | ÷ | ( | x | + | 693 10 | ) | = | 3 10 | + | 4 165 |
| x | × | 1 87 | ÷ | ( | x | + | 693 10 | ) | = | 107 330 |
| 方程两边同时乘以: | ( | x | + | 693 10 | ) |
| x | × | 1 87 | = | 107 330 | ( | x | + | 693 10 | ) |
| x | × | 1 87 | = | 107 330 | x | + | 107 330 | × | 693 10 |
| x | × | 1 87 | = | 107 330 | x | + | 2247 100 |
1 87 | x | − | 107 330 | x | = | 2247 100 |
| - | 2993 9570 | x | = | 2247 100 |
| - | 2247 100 | = | 2993 9570 | x |
2993 9570 | x | = | - | 2247 100 |
| x | = | - | 2247 100 | ÷ | 2993 9570 |
| = | - | 2247 100 | × | 9570 2993 |
| = | - | 2247 10 | × | 957 2993 |
| x | = | - | 2150379 29930 |
| x | = | - 71.846943 |