| ( | 84339 | − | 3 2 | X | ) | × | 42 5 | ÷ | 102 5 | × | 9 10 | = | 19522 | + | 7 | X |
| 方程左边 = | ( | 84339 | − | 3 2 | X | ) | × | 63 170 |
| ( | 84339 | − | 3 2 | X | ) | × | 63 170 | = | 19522 | + | 7 | X |
| 方程左边 = | 84339 | × | 63 170 | − | 3 2 | X | × | 63 170 |
| = | 5313357 170 | − | 189 340 | X |
5313357 170 | − | 189 340 | X | = | 19522 | + | 7 | X |
| - | 189 340 | X | − | 7 | X | = | 19522 | − | 5313357 170 |
| - | 2569 340 | X | = | 19522 | − | 5313357 170 |
| - | 2569 340 | X | = | - | 1994617 170 |
1994617 170 | = | 2569 340 | X |
2569 340 | X | = | 1994617 170 |
| X | = | 1994617 170 | ÷ | 2569 340 |
| = | 1994617 170 | × | 340 2569 |
| = | 1994617 | × | 2 2569 |
| X | = | 3989234 2569 |
| X | = | 1552.835344 |