| 302 | + | x | = | 87 100 | ( | 352 | + | x | ) |
| 方程右边 = | 87 100 | × | 352 | + | 87 100 | x |
| = | 7656 25 | + | 87 100 | x |
| 302 | + | x | = | 7656 25 | + | 87 100 | x |
| x | − | 87 100 | x | = | 7656 25 | − | 302 |
13 100 | x | = | 7656 25 | − | 302 |
13 100 | x | = | 106 25 |
| x | = | 106 25 | ÷ | 13 100 |
| = | 106 25 | × | 100 13 |
| = | 106 | × | 4 13 |
| x | = | 424 13 |
| x | = | 32.615385 |