| - | 5969 50 | − | 5969 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | − | 5969 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 6 | ) | + | 381 50 | = | 0 |
| 方程两边同时乘以: | ( | 1 | + | X | ÷ | 12 | × | 2 | ) |
| - | 5969 50 | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | − | 5969 50 | − | 5969 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | = | 0 |
| - | 5969 50 | × | 1 | − | 5969 50 | X | ÷ | 12 | × | 2 | − | 5969 50 | − | 5969 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | = | 0 |
| - | 5969 50 | − | 5969 300 | X | − | 5969 50 | − | 5969 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | = | 0 |
| - | 5969 25 | − | 5969 300 | X | − | 5969 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | = | 0 |
| 方程两边同时乘以: | ( | 1 | + | X | ÷ | 12 | × | 3 | ) |
| - | 5969 25 | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | − | 5969 300 | X | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | − | 5969 50 | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | + | 381 50 | = | 0 |
| - | 5969 25 | × | 1 | − | 5969 25 | X | ÷ | 12 | × | 3 | − | 5969 300 | X | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | − | 5969 50 | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | + | 381 50 | = | 0 |
| - | 5969 25 | − | 5969 100 | X | − | 5969 300 | X | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | − | 5969 50 | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | + | 381 50 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | = | 0 |
| 方程两边同时乘以: | ( | 1 | + | X | ÷ | 12 | × | 4 | ) |
| - | 5969 25 | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | − | 5969 100 | X | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | − | 5969 300 | X | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | − | 5969 50 | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | = | 0 |
| - | 5969 25 | × | 1 | − | 5969 25 | X | ÷ | 12 | × | 4 | − | 5969 100 | X | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | − | 5969 300 | X | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | = | 0 |
| - | 5969 25 | − | 5969 75 | X | − | 5969 100 | X | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | − | 5969 300 | X | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | − | 5969 50 | ( | 1 | + | X | ÷ | 12 | × | 2 | ) | = | 0 |
| 方程两边同时乘以: | ( | 1 | + | X | ÷ | 12 | × | 5 | ) |
| - | 5969 25 | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | − | 5969 75 | X | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | − | 5969 100 | X | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | − | 5969 300 | X | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | = | 0 |
| - | 5969 25 | × | 1 | − | 5969 25 | X | ÷ | 12 | × | 5 | − | 5969 75 | X | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | − | 5969 100 | X | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | = | 0 |
| - | 5969 25 | − | 5969 60 | X | − | 5969 75 | X | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | − | 5969 100 | X | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | − | 5969 300 | X | = | 0 |
| 方程两边同时乘以: | ( | 1 | + | X | ÷ | 12 | × | 6 | ) |
| - | 5969 25 | ( | 1 | + | X | ÷ | 12 | × | 6 | ) | − | 5969 60 | X | ( | 1 | + | X | ÷ | 12 | × | 6 | ) | − | 5969 75 | X | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | ( | 1 | + | X | ÷ | 12 | × | 6 | ) | − | 5969 100 | X | ( | 1 | + | X | ÷ | 12 | × | 4 | ) | = | 0 |
| - | 5969 25 | × | 1 | − | 5969 25 | X | ÷ | 12 | × | 6 | − | 5969 60 | X | ( | 1 | + | X | ÷ | 12 | × | 6 | ) | − | 5969 75 | X | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | = | 0 |
| - | 5969 25 | − | 5969 50 | X | − | 5969 60 | X | ( | 1 | + | X | ÷ | 12 | × | 6 | ) | − | 5969 75 | X | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | ( | 1 | + | X | ÷ | 12 | × | 6 | ) | − | 5969 100 | X | = | 0 |
| 方程两边同时乘以: | ( | 1 | + | X | ÷ | 12 | × | 7 | ) |
| - | 5969 25 | ( | 1 | + | X | ÷ | 12 | × | 7 | ) | − | 5969 50 | X | ( | 1 | + | X | ÷ | 12 | × | 7 | ) | − | 5969 60 | X | ( | 1 | + | X | ÷ | 12 | × | 6 | ) | ( | 1 | + | X | ÷ | 12 | × | 7 | ) | − | 5969 75 | X | ( | 1 | + | X | ÷ | 12 | × | 5 | ) | = | 0 |
| - | 5969 25 | × | 1 | − | 5969 25 | X | ÷ | 12 | × | 7 | − | 5969 50 | X | ( | 1 | + | X | ÷ | 12 | × | 7 | ) | − | 5969 60 | X | ( | 1 | + | X | ÷ | 12 | × | 6 | ) | = | 0 |
| - | 5969 25 | − | 41783 300 | X | − | 5969 50 | X | ( | 1 | + | X | ÷ | 12 | × | 7 | ) | − | 5969 60 | X | ( | 1 | + | X | ÷ | 12 | × | 6 | ) | ( | 1 | + | X | ÷ | 12 | × | 7 | ) | − | 5969 75 | X | = | 0 |
| 方程两边同时乘以: | ( | 1 | + | X | ÷ | 12 | × | 8 | ) |