969 125 | + | 353 100 | x | = | 3509 1000 | ( | x | + | 67 20 | ) |
| 方程右边 = | 3509 1000 | x | + | 3509 1000 | × | 67 20 |
| = | 3509 1000 | x | + | 235103 20000 |
969 125 | + | 353 100 | x | = | 3509 1000 | x | + | 235103 20000 |
353 100 | x | − | 3509 1000 | x | = | 235103 20000 | − | 969 125 |
21 1000 | x | = | 235103 20000 | − | 969 125 |
21 1000 | x | = | 80063 20000 |
| x | = | 80063 20000 | ÷ | 21 1000 |
| = | 80063 20000 | × | 1000 21 |
| = | 80063 20 | × | 1 21 |
| x | = | 80063 420 |
| x | = | 190.62619 |