| ( | X | − | 500 | − | 6000 | × | 6 100 | ) | × | 3 4 | ÷ | 3000 | = | ( | X | − | 500 | ) | × | 3 4 | ÷ | ( | 3000 | + | 1000 | ) |
| 方程两边同时乘以: | ( | 3000 | + | 1000 | ) |
| ( | X | − | 500 | − | 6000 | × | 6 100 | ) | × | 3 4 | ÷ | 3000 | × | ( | 3000 | + | 1000 | ) | = | ( | X | − | 500 | ) | × | 3 4 |
| X | × | 3 4 | ÷ | 3000 | × | ( | 3000 | + | 1000 | ) | − | 500 | × | 3 4 | ÷ | 3000 | × | ( | 3000 | + | 1000 | ) | − | 6000 | × | 6 100 | × | 3 4 | ÷ | 3000 | = | ( | X | − | 500 | ) | × | 3 4 |
| X | × | 3 4 | ÷ | 3000 | × | ( | 3000 | + | 1000 | ) | − | 500 | × | 3 4 | ÷ | 3000 | × | ( | 3000 | + | 1000 | ) | − | 6000 | × | 6 100 | × | 3 4 | ÷ | 3000 | = | X | × | 3 4 | − | 500 | × | 3 4 |
| X | × | 1 4000 | ( | 3000 | + | 1000 | ) | − | 1 8 | ( | 3000 | + | 1000 | ) | − | 9 100 | ( | 3000 | + | 1000 | ) | = | X | × | 3 4 | − | 375 |
| X | × | 1 4000 | × | 3000 | + | X | × | 1 4000 | × | 1000 | − | 1 8 | ( | 3000 | + | 1000 | ) | − | 9 100 | ( | 3000 | + | 1000 | ) | = | 3 4 | X | − | 375 |
| X | × | 3 4 | + | X | × | 1 4 | − | 1 8 | ( | 3000 | + | 1000 | ) | − | 9 100 | ( | 3000 | + | 1000 | ) | = | 3 4 | X | − | 375 |
| 1 | X | − | 1 8 | ( | 3000 | + | 1000 | ) | − | 9 100 | ( | 3000 | + | 1000 | ) | = | 3 4 | X | − | 375 |
| 1 | X | − | 1 8 | × | 3000 | − | 1 8 | × | 1000 | − | 9 100 | ( | 3000 | + | 1000 | ) | = | 3 4 | X | − | 375 |
| 1 | X | − | 375 | − | 125 | − | 9 100 | ( | 3000 | + | 1000 | ) | = | 3 4 | X | − | 375 |
| 1 | X | − | 500 | − | 9 100 | ( | 3000 | + | 1000 | ) | = | 3 4 | X | − | 375 |
| 1 | X | − | 500 | − | 9 100 | × | 3000 | − | 9 100 | × | 1000 | = | 3 4 | X | − | 375 |
| 1 | X | − | 500 | − | 270 | − | 90 | = | 3 4 | X | − | 375 |
| 1 | X | − | 860 | = | 3 4 | X | − | 375 |
| 1 | X | − | 3 4 | X | = | - | 375 | + | 860 |
1 4 | X | = | - | 375 | + | 860 |
1 4 | X | = | 485 |
| X | = | 485 | ÷ | 1 4 |
| = | 485 | × | 4 |
| X | = | 1940 |