| ( | 187 | + | x | ) | ÷ | ( | 204 | + | x | ) | = | 491 500 |
| 方程两边同时乘以: | ( | 204 | + | x | ) |
| ( | 187 | + | x | ) | = | 491 500 | ( | 204 | + | x | ) |
| 187 | + | x | = | 491 500 | ( | 204 | + | x | ) |
| 187 | + | x | = | 491 500 | × | 204 | + | 491 500 | x |
| 187 | + | x | = | 25041 125 | + | 491 500 | x |
| x | − | 491 500 | x | = | 25041 125 | − | 187 |
9 500 | x | = | 25041 125 | − | 187 |
9 500 | x | = | 1666 125 |
| x | = | 1666 125 | ÷ | 9 500 |
| = | 1666 125 | × | 500 9 |
| = | 1666 | × | 4 9 |
| x | = | 6664 9 |
| x | = | 740.444444 |