| ( | x | + | 5000 | ) | ÷ | 3 4 | ÷ | 31 20 | = | x |
| 方程左边 = | ( | x | + | 5000 | ) | × | 80 93 |
| ( | x | + | 5000 | ) | × | 80 93 | = | x |
| 方程左边 = | x | × | 80 93 | + | 5000 | × | 80 93 |
| = | x | × | 80 93 | + | 400000 93 |
80 93 | x | + | 400000 93 | = | x |
80 93 | x | − | x | = | - | 400000 93 |
| - | 13 93 | x | = | - | 400000 93 |
400000 93 | = | 13 93 | x |
13 93 | x | = | 400000 93 |
| x | = | 400000 93 | ÷ | 13 93 |
| = | 400000 93 | × | 93 13 |
| = | 400000 | × | 1 13 |
| x | = | 400000 13 |
| x | = | 30769.230769 |