| - | 3159 40 | + | 169 2 | ÷ | ( | 1 | + | ( | X | ÷ | 12 | × | 6 | ) | + | 13 40 | ÷ | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | ) | = | 0 |
| 方程两边同时乘以: | ( | 1 | + | ( | X | ÷ | 12 | × | 6 | ) | + | 13 40 | ÷ | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | ) |
| - | 3159 40 | ( | 1 | + | ( | X | ÷ | 12 | × | 6 | ) | + | 13 40 | ÷ | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | ) | + | 169 2 | = | 0 |
| - | 3159 40 | × | 1 | − | 3159 40 | ( | X | ÷ | 12 | × | 6 | ) | − | 3159 40 | × | 13 40 | ÷ | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | + | 169 2 | = | 0 |
| - | 3159 40 | − | 3159 40 | ( | X | ÷ | 12 | × | 6 | ) | − | 41067 1600 | ÷ | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | + | 169 2 | = | 0 |
221 40 | − | 3159 40 | ( | X | ÷ | 12 | × | 6 | ) | − | 41067 1600 | ÷ | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | = | 0 |
| 方程两边同时乘以: | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) |
221 40 | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | − | 3159 40 | ( | X | ÷ | 12 | × | 6 | ) | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | − | 41067 1600 | = | 0 |
221 40 | × | 1 | + | 221 40 | ( | X | ÷ | 12 | × | 13 | ) | − | 3159 40 | ( | X | ÷ | 12 | × | 6 | ) | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | − | 41067 1600 | = | 0 |
221 40 | + | 221 40 | ( | X | ÷ | 12 | × | 13 | ) | − | 3159 40 | ( | X | ÷ | 12 | × | 6 | ) | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | − | 41067 1600 | = | 0 |
| - | 32227 1600 | + | 221 40 | ( | X | ÷ | 12 | × | 13 | ) | − | 3159 40 | ( | X | ÷ | 12 | × | 6 | ) | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | = | 0 |
| - | 32227 1600 | + | 221 40 | X | ÷ | 12 | × | 13 | − | 3159 40 | ( | X | ÷ | 12 | × | 6 | ) | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | = | 0 |
| - | 32227 1600 | + | 2873 480 | X | − | 3159 40 | ( | X | ÷ | 12 | × | 6 | ) | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | = | 0 |
| - | 32227 1600 | + | 2873 480 | X | − | 3159 40 | X | ÷ | 12 | × | 6 | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | = | 0 |
| - | 32227 1600 | + | 2873 480 | X | − | 3159 80 | X | ( | 1 | + | ( | X | ÷ | 12 | × | 13 | ) | ) | = | 0 |
| - | 32227 1600 | + | 2873 480 | X | − | 3159 80 | X | × | 1 | − | 3159 80 | X | ( | X | ÷ | 12 | × | 13 | ) | = | 0 |
| - | 32227 1600 | + | 2873 480 | X | − | 3159 80 | X | − | 3159 80 | X | ( | X | ÷ | 12 | × | 13 | ) | = | 0 |
| - | 32227 1600 | − | 16081 480 | X | − | 3159 80 | X | ( | X | ÷ | 12 | × | 13 | ) | = | 0 |
| - | 32227 1600 | − | 16081 480 | X | − | 3159 80 | X | X | ÷ | 12 | × | 13 | = | 0 |
| - | 32227 1600 | − | 16081 480 | X | − | 13689 320 | X | X | = | 0 |