| x | ÷ | 21 20 | − | x | ÷ | 21 20 | × | 3 50 | − | x | × | 1 1000 | − | x | ÷ | 21 20 | × | 1 20 | × | 3 25 | − | ( | x | ÷ | 21 20 | − | x | ÷ | 21 20 | × | 3 50 | − | x | × | 1 1000 | − | x | ÷ | 21 20 | × | 1 20 | × | 3 25 | ) | = | 116000 |
| 方程左边 = | x | × | 20 21 | − | x | × | 2 35 | − | x | × | 1 1000 | − | x | × | 1 175 | − | ( | x | ÷ | 21 20 | − | x | ÷ | 21 20 | × | 3 50 | − | x | × | 1 1000 | − | x | ÷ | 21 20 | × | 1 20 | × | 3 25 | ) | × | 4 25 |
| = | 18659 21000 | x | − | ( | x | ÷ | 21 20 | − | x | ÷ | 21 20 | × | 3 50 | − | x | × | 1 1000 | − | x | ÷ | 21 20 | × | 1 20 | × | 3 25 | ) | × | 4 25 |
18659 21000 | x | − | ( | x | ÷ | 21 20 | − | x | ÷ | 21 20 | × | 3 50 | − | x | × | 1 1000 | − | x | ÷ | 21 20 | × | 1 20 | × | 3 25 | ) | × | 4 25 | = | 116000 |
| 方程左边 = | 18659 21000 | x | − | x | ÷ | 21 20 | × | 4 25 | + | x | ÷ | 21 20 | × | 3 50 | × | 4 25 | + | x | × | 1 1000 | × | 4 25 |
| = | 18659 21000 | x | − | x | × | 16 105 | + | x | × | 8 875 | + | x | × | 1 6250 | + | x | × | 4 4375 |
| = | 18659 25000 | x |
18659 25000 | x | = | 116000 |
| x | = | 116000 | ÷ | 18659 25000 |
| = | 116000 | × | 25000 18659 |
| x | = | 2900000000 18659 |
| x | = | 155420.976472 |