| X | − | 8000 | ÷ | ( | 1000000 | ÷ | 3000 | ) | − | 10 | − | 8 | − | X | × | 3 20 | = | 5 |
| 方程两边同时乘以: | ( | 1000000 | ÷ | 3000 | ) |
| X | ( | 1000000 | ÷ | 3000 | ) | − | 8000 | − | 10 | ( | 1000000 | ÷ | 3000 | ) | − | 8 | ( | 1000000 | ÷ | 3000 | ) | − | X | × | 3 20 | ( | 1000000 | ÷ | 3000 | ) | = | 5 | ( | 1000000 | ÷ | 3000 | ) |
| X | × | 1000000 | ÷ | 3000 | − | 8000 | − | 10 | ( | 1000000 | ÷ | 3000 | ) | − | 8 | ( | 1000000 | ÷ | 3000 | ) | − | X | × | 3 20 | ( | 1000000 | ÷ | 3000 | ) | = | 5 | ( | 1000000 | ÷ | 3000 | ) |
| X | × | 1000000 | ÷ | 3000 | − | 8000 | − | 10 | ( | 1000000 | ÷ | 3000 | ) | − | 8 | ( | 1000000 | ÷ | 3000 | ) | − | X | × | 3 20 | ( | 1000000 | ÷ | 3000 | ) | = | 5 | × | 1000000 | ÷ | 3000 |
| X | × | 1000 3 | − | 8000 | − | 10 | ( | 1000000 | ÷ | 3000 | ) | − | 8 | ( | 1000000 | ÷ | 3000 | ) | − | X | × | 3 20 | ( | 1000000 | ÷ | 3000 | ) | = | 5000 3 |
1000 3 | X | − | 8000 | − | 10 | × | 1000000 | ÷ | 3000 | − | 8 | ( | 1000000 | ÷ | 3000 | ) | − | X | × | 3 20 | ( | 1000000 | ÷ | 3000 | ) | = | 5000 3 |
1000 3 | X | − | 8000 | − | 10000 3 | − | 8 | ( | 1000000 | ÷ | 3000 | ) | − | X | × | 3 20 | ( | 1000000 | ÷ | 3000 | ) | = | 5000 3 |
1000 3 | X | − | 34000 3 | − | 8 | ( | 1000000 | ÷ | 3000 | ) | − | X | × | 3 20 | ( | 1000000 | ÷ | 3000 | ) | = | 5000 3 |
1000 3 | X | − | 34000 3 | − | 8 | × | 1000000 | ÷ | 3000 | − | X | × | 3 20 | ( | 1000000 | ÷ | 3000 | ) | = | 5000 3 |
1000 3 | X | − | 34000 3 | − | 8000 3 | − | X | × | 3 20 | ( | 1000000 | ÷ | 3000 | ) | = | 5000 3 |
1000 3 | X | − | 14000 | − | X | × | 3 20 | ( | 1000000 | ÷ | 3000 | ) | = | 5000 3 |
1000 3 | X | − | 14000 | − | X | × | 3 20 | × | 1000000 | ÷ | 3000 | = | 5000 3 |
1000 3 | X | − | 14000 | − | X | × | 50 | = | 5000 3 |
850 3 | X | − | 14000 | = | 5000 3 |
850 3 | X | = | 5000 3 | + | 14000 |
850 3 | X | = | 47000 3 |
| X | = | 47000 3 | ÷ | 850 3 |
| = | 47000 3 | × | 3 850 |
| = | 940 | × | 1 17 |
| X | = | 940 17 |
| X | = | 55.294118 |