| 2220 | x | + | ( | 5 | − | x | ) | ÷ | 2 | × | 2858 5 | = | 3847 |
| 方程左边 = | 2220 | x | + | ( | 5 | − | x | ) | × | 1429 5 |
| 2220 | x | + | ( | 5 | − | x | ) | × | 1429 5 | = | 3847 |
| 方程左边 = | 2220 | x | + | 5 | × | 1429 5 | − | x | × | 1429 5 |
| = | 2220 | x | + | 1429 | − | x | × | 1429 5 |
| = | 9671 5 | x | + | 1429 |
9671 5 | x | + | 1429 | = | 3847 |
9671 5 | x | = | 3847 | − | 1429 |
9671 5 | x | = | 2418 |
| x | = | 2418 | ÷ | 9671 5 |
| = | 2418 | × | 5 9671 |
| x | = | 12090 9671 |
| x | = | 1.250129 |