| ( | 49380 | + | x | ) | ÷ | 53 50 | × | 3 50 | × | 28 25 | = | 309873 100 |
| 方程左边 = | ( | 49380 | + | x | ) | × | 84 1325 |
| ( | 49380 | + | x | ) | × | 84 1325 | = | 309873 100 |
| 方程左边 = | 49380 | × | 84 1325 | + | x | × | 84 1325 |
| = | 829584 265 | + | x | × | 84 1325 |
829584 265 | + | 84 1325 | x | = | 309873 100 |
84 1325 | x | = | 309873 100 | − | 829584 265 |
84 1325 | x | = | - | 168411 5300 |
| x | = | - | 168411 5300 | ÷ | 84 1325 |
| = | - | 168411 5300 | × | 1325 84 |
| = | - | 56137 4 | × | 1 28 |
| x | = | - | 56137 112 |
| x | = | - 501.223214 |