| ( | x | ÷ | 27 10 | ) | + | ( | ( | 374 | − | x | ) | ÷ | 79 10 | ) | = | 100 |
| 方程左边 = | x | ÷ | 27 10 | + | ( | ( | 374 | − | x | ) | ÷ | 79 10 | ) |
| = | 10 27 | x | + | ( | 374 | − | x | ) | ÷ | 79 10 |
| = | 10 27 | x | + | 374 | × | 10 79 | − | x | × | 10 79 |
| = | 10 27 | x | + | 3740 79 | − | x | × | 10 79 |
| = | 520 2133 | x | + | 3740 79 |
520 2133 | x | + | 3740 79 | = | 100 |
520 2133 | x | = | 100 | − | 3740 79 |
520 2133 | x | = | 4160 79 |
| x | = | 4160 79 | ÷ | 520 2133 |
| = | 4160 79 | × | 2133 520 |
| = | 8 | × | 27 |
| x | = | 216 |