1 10 | x | + | ( | x | × | 21 20 | + | 200 | ) | + | 3 20 | x | + | ( | 1 10 | x | × | 1667 10000 | ) | = | 81439 5 |
| 方程左边 = | 1 4 | x | + | ( | x | × | 21 20 | + | 200 | ) | + | ( | 1 10 | x | × | 1667 10000 | ) |
1 4 | x | + | ( | x | × | 21 20 | + | 200 | ) | + | ( | 1 10 | x | × | 1667 10000 | ) | = | 81439 5 |
| 方程左边 = | 1 4 | x | + | x | × | 21 20 | + | 200 | + | ( | 1 10 | x | × | 1667 10000 | ) |
| = | 13 10 | x | + | 200 | + | ( | 1 10 | x | × | 1667 10000 | ) |
| = | 13 10 | x | + | 200 | + | 1 10 | x | × | 1667 10000 |
| = | 13 10 | x | + | 200 | + | 1667 100000 | x |
| = | 131667 100000 | x | + | 200 |
131667 100000 | x | + | 200 | = | 81439 5 |
131667 100000 | x | = | 81439 5 | − | 200 |
131667 100000 | x | = | 80439 5 |
| x | = | 80439 5 | ÷ | 131667 100000 |
| = | 80439 5 | × | 100000 131667 |
| = | 26813 | × | 20000 43889 |
| x | = | 536260000 43889 |
| x | = | 12218.551345 |