| ( | 1343 25 | ( | 1 | + | 20 100 | ) | ) | + | ( | 7 100 | x | ) | = | x |
| 方程左边 = | 1343 25 | ( | 1 | + | 20 100 | ) | + | ( | 7 100 | x | ) |
| = | 1343 25 | × | 1 | + | 1343 25 | × | 20 100 | + | ( | 7 100 | x | ) |
| = | 1343 25 | + | 1343 125 | + | ( | 7 100 | x | ) |
| = | 8058 125 | + | ( | 7 100 | x | ) |
| = | 8058 125 | + | 7 100 | x |
8058 125 | + | 7 100 | x | = | x |
7 100 | x | − | x | = | - | 8058 125 |
| - | 93 100 | x | = | - | 8058 125 |
8058 125 | = | 93 100 | x |
93 100 | x | = | 8058 125 |
| x | = | 8058 125 | ÷ | 93 100 |
| = | 8058 125 | × | 100 93 |
| = | 2686 5 | × | 4 31 |
| x | = | 10744 155 |
| x | = | 69.316129 |