| ( | 223 20 | − | x | ) | + | ( | 107 100 | × | 109 100 | ) | x | = | 1291 100 |
| 方程左边 = | 223 20 | − | x | + | ( | 107 100 | × | 109 100 | ) | x |
| = | 223 20 | − | x | + | 107 100 | × | 109 100 | x |
| = | 223 20 | − | x | + | 11663 10000 | x |
| = | 223 20 | + | 1663 10000 | x |
223 20 | + | 1663 10000 | x | = | 1291 100 |
1663 10000 | x | = | 1291 100 | − | 223 20 |
1663 10000 | x | = | 44 25 |
| x | = | 44 25 | ÷ | 1663 10000 |
| = | 44 25 | × | 10000 1663 |
| = | 44 | × | 400 1663 |
| x | = | 17600 1663 |
| x | = | 10.583283 |