| X | ÷ | 87 | + | ( | 35 | − | X | ) | ÷ | 126 | − | 3 50 | = | 119 500 |
| 方程左边 = | 1 87 | X | + | 35 | × | 1 126 | − | X | × | 1 126 | − | 3 50 |
| = | 1 87 | X | + | 5 18 | − | X | × | 1 126 | − | 3 50 |
| = | 13 3654 | X | + | 49 225 |
13 3654 | X | + | 49 225 | = | 119 500 |
13 3654 | X | = | 119 500 | − | 49 225 |
13 3654 | X | = | 91 4500 |
| X | = | 91 4500 | ÷ | 13 3654 |
| = | 91 4500 | × | 3654 13 |
| = | 7 250 | × | 203 |
| X | = | 1421 250 |
| X | = | 5.684 |