| x | ÷ | 10599 100 | + | ( | 617 2000 | − | x | ÷ | 40 | ) | = | 42 | × | 1 1000 | × | 3 20 |
| 方程左边 = | 100 10599 | x | + | 617 2000 | − | x | ÷ | 40 |
| = | - | 6599 423960 | x | + | 617 2000 |
| - | 6599 423960 | x | + | 617 2000 | = | 42 | × | 1 1000 | × | 3 20 |
| 方程右边 = | 63 10000 |
| - | 6599 423960 | x | + | 617 2000 | = | 63 10000 |
| - | 6599 423960 | x | = | 63 10000 | − | 617 2000 |
| - | 6599 423960 | x | = | - | 1511 5000 |
1511 5000 | = | 6599 423960 | x |
6599 423960 | x | = | 1511 5000 |
| x | = | 1511 5000 | ÷ | 6599 423960 |
| = | 1511 5000 | × | 423960 6599 |
| = | 1511 125 | × | 10599 6599 |
| x | = | 16015089 824875 |
| x | = | 19.415171 |