69 1000 | = | 3 125 | + | 9 200 | ( | 33 500 | − | x | ) |
| 方程右边 = | 3 125 | + | 9 200 | × | 33 500 | − | 9 200 | x |
| = | 3 125 | + | 297 100000 | − | 9 200 | x |
| = | 2697 100000 | − | 9 200 | x |
69 1000 | = | 2697 100000 | − | 9 200 | x |
9 200 | x | = | 2697 100000 | − | 69 1000 |
9 200 | x | = | - | 4203 100000 |
| x | = | - | 4203 100000 | ÷ | 9 200 |
| = | - | 4203 100000 | × | 200 9 |
| = | - | 467 500 | × | 1 |
| x | = | - | 467 500 |
| x | = | - 0.934 |