| ( | 25759 1000 | + | x | ) | × | 43 20 | = | 51519 1000 | + | 34539 500 | − | x |
| 方程左边 = | 25759 1000 | × | 43 20 | + | x | × | 43 20 |
| = | 1107637 20000 | + | x | × | 43 20 |
1107637 20000 | + | 43 20 | x | = | 51519 1000 | + | 34539 500 | − | x |
| 方程右边 = | 120597 1000 | − | x |
1107637 20000 | + | 43 20 | x | = | 120597 1000 | − | x |
43 20 | x | + | x | = | 120597 1000 | − | 1107637 20000 |
63 20 | x | = | 120597 1000 | − | 1107637 20000 |
63 20 | x | = | 1304303 20000 |
| x | = | 1304303 20000 | ÷ | 63 20 |
| = | 1304303 20000 | × | 20 63 |
| = | 186329 1000 | × | 1 9 |
| x | = | 186329 9000 |
| x | = | 20.703222 |