| ( | 2 | x | + | 407 5 | ) | × | 27 25 | − | 2 | x | − | 10099 100 | = | 0 |
| 方程左边 = | 2 | x | × | 27 25 | + | 407 5 | × | 27 25 | − | 2 | x | − | 10099 100 |
| = | 54 25 | x | + | 10989 125 | − | 2 | x | − | 10099 100 |
| = | 4 25 | x | − | 6539 500 |
4 25 | x | − | 6539 500 | = | 0 |
4 25 | x | = | 0 | + | 6539 500 |
4 25 | x | = | 6539 500 |
| x | = | 6539 500 | ÷ | 4 25 |
| = | 6539 500 | × | 25 4 |
| = | 6539 20 | × | 1 4 |
| x | = | 6539 80 |
| x | = | 81.7375 |