| 4700 | + | 1500 | + | x | + | ( | ( | 4700 | + | x | ) | ÷ | 87 4 | × | 8 | ) | = | 8500 |
| 方程左边 = | 6200 | + | x | + | ( | ( | 4700 | + | x | ) | ÷ | 87 4 | × | 8 | ) |
| 6200 | + | x | + | ( | ( | 4700 | + | x | ) | ÷ | 87 4 | × | 8 | ) | = | 8500 |
| 方程左边 = | 6200 | + | x | + | ( | 4700 | + | x | ) | ÷ | 87 4 | × | 8 |
| = | 6200 | + | x | + | ( | 4700 | + | x | ) | × | 32 87 |
| = | 6200 | + | x | + | 4700 | × | 32 87 | + | x | × | 32 87 |
| = | 6200 | + | x | + | 150400 87 | + | x | × | 32 87 |
| = | 689800 87 | + | 119 87 | x |
689800 87 | + | 119 87 | x | = | 8500 |
119 87 | x | = | 8500 | − | 689800 87 |
119 87 | x | = | 49700 87 |
| x | = | 49700 87 | ÷ | 119 87 |
| = | 49700 87 | × | 87 119 |
| = | 7100 | × | 1 17 |
| x | = | 7100 17 |
| x | = | 417.647059 |