| ( | ( | 100 | X | − | 68357 100 | − | ( | 13 | X | − | 20 | ) | × | 1 10 | ) | × | 3 4 | ) | ÷ | 2350 | = | 2 25 |
| 方程左边 = | ( | 100 | X | − | 68357 100 | − | ( | 13 | X | − | 20 | ) | × | 1 10 | ) | × | 3 4 | × | 1 2350 |
| = | ( | 100 | X | − | 68357 100 | − | ( | 13 | X | − | 20 | ) | × | 1 10 | ) | × | 3 9400 |
| = | 100 | X | × | 3 9400 | − | 68357 100 | × | 3 9400 | − | ( | 13 | X | − | 20 | ) | × | 1 10 | × | 3 9400 |
| = | 3 94 | X | − | 205071 940000 | − | ( | 13 | X | − | 20 | ) | × | 3 94000 |
| = | 3 94 | X | − | 205071 940000 | − | 13 | X | × | 3 94000 | + | 20 | × | 3 94000 |
| = | 3 94 | X | − | 205071 940000 | − | 39 94000 | X | + | 3 4700 |
| = | 63 2000 | X | − | 204471 940000 |
63 2000 | X | − | 204471 940000 | = | 2 25 |
63 2000 | X | = | 2 25 | + | 204471 940000 |
63 2000 | X | = | 279671 940000 |
| X | = | 279671 940000 | ÷ | 63 2000 |
| = | 279671 940000 | × | 2000 63 |
| = | 39953 470 | × | 1 9 |
| X | = | 39953 4230 |
| X | = | 9.445154 |