| ( | 25851 1000 | + | x | ) | × | 43 20 | = | 25851 500 | + | 69853 1000 | − | x |
| 方程左边 = | 25851 1000 | × | 43 20 | + | x | × | 43 20 |
| = | 1111593 20000 | + | x | × | 43 20 |
1111593 20000 | + | 43 20 | x | = | 25851 500 | + | 69853 1000 | − | x |
| 方程右边 = | 24311 200 | − | x |
1111593 20000 | + | 43 20 | x | = | 24311 200 | − | x |
43 20 | x | + | x | = | 24311 200 | − | 1111593 20000 |
63 20 | x | = | 24311 200 | − | 1111593 20000 |
63 20 | x | = | 1319507 20000 |
| x | = | 1319507 20000 | ÷ | 63 20 |
| = | 1319507 20000 | × | 20 63 |
| = | 188501 1000 | × | 1 9 |
| x | = | 188501 9000 |
| x | = | 20.944556 |