| ( | x | × | 321 100 | ) | ÷ | 321 100 | + | ( | x | × | 321 100 | ) | = | 42858 5 |
| 方程左边 = | x | × | 321 100 | × | 100 321 | + | ( | x | × | 321 100 | ) |
| = | x | × | 1 | + | ( | x | × | 321 100 | ) |
| = | 1 | x | + | x | × | 321 100 |
| = | 421 100 | x |
421 100 | x | = | 42858 5 |
| x | = | 42858 5 | ÷ | 421 100 |
| = | 42858 5 | × | 100 421 |
| = | 42858 | × | 20 421 |
| x | = | 857160 421 |
| x | = | 2036.009501 |