| ( | 279 | ( | 1 | + | 20 100 | ) | ) | + | ( | x | × | 5 100 | ) | = | x |
| 方程左边 = | 279 | ( | 1 | + | 20 100 | ) | + | ( | x | × | 5 100 | ) |
| = | 279 | × | 1 | + | 279 | × | 20 100 | + | ( | x | × | 5 100 | ) |
| = | 279 | + | 279 5 | + | ( | x | × | 5 100 | ) |
| = | 1674 5 | + | ( | x | × | 5 100 | ) |
| = | 1674 5 | + | x | × | 5 100 |
1674 5 | + | 5 100 | x | = | x |
5 100 | x | − | x | = | - | 1674 5 |
| - | 19 20 | x | = | - | 1674 5 |
1674 5 | = | 19 20 | x |
19 20 | x | = | 1674 5 |
| x | = | 1674 5 | ÷ | 19 20 |
| = | 1674 5 | × | 20 19 |
| = | 1674 | × | 4 19 |
| x | = | 6696 19 |
| x | = | 352.421053 |