| ( | 220 | × | 2 | × | 55 | − | x | ) | × | 9 10 | + | 18 | × | 55 | = | 98692 5 |
| 方程左边 = | ( | 220 | × | 2 | × | 55 | − | x | ) | × | 9 10 | + | 990 |
| ( | 220 | × | 2 | × | 55 | − | x | ) | × | 9 10 | + | 990 | = | 98692 5 |
| 方程左边 = | 220 | × | 2 | × | 55 | × | 9 10 | − | x | × | 9 10 | + | 990 |
| = | 21780 | − | x | × | 9 10 | + | 990 |
| = | 22770 | − | 9 10 | x |
| 22770 | − | 9 10 | x | = | 98692 5 |
| - | 9 10 | x | = | 98692 5 | − | 22770 |
| - | 9 10 | x | = | - | 15158 5 |
15158 5 | = | 9 10 | x |
9 10 | x | = | 15158 5 |
| x | = | 15158 5 | ÷ | 9 10 |
| = | 15158 5 | × | 10 9 |
| = | 15158 | × | 2 9 |
| x | = | 30316 9 |
| x | = | 3368.444444 |