8 5 | × | 5 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 5 2 | × | 1 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 7 4 |
| 方程两边同时乘以: | ( | 5 2 | + | 1 | + | 3 2 | ) |
8 5 | × | 5 2 | + | 5 2 | × | 1 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 7 4 | ( | 5 2 | + | 1 | + | 3 2 | ) |
8 5 | × | 5 2 | + | 5 2 | × | 1 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | 5 2 | + | 5 2 | × | 1 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | 1 | + | 5 2 | × | 1 | = | 7 4 | ( | 5 2 | + | 1 | + | 3 2 | ) |
8 5 | × | 5 2 | + | 5 2 | × | 1 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | 5 2 | + | 5 2 | × | 1 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | 1 | + | 5 2 | × | 1 | = | 7 4 | × | 5 2 | + | 7 4 | × | 1 | + | 7 4 | × | 3 2 |
| 4 | + | 25 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 5 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 35 8 | + | 7 4 | + | 21 8 |
| 4 | + | 25 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 5 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 35 4 |
| 方程两边同时乘以: | ( | 5 2 | + | 1 | + | 3 2 | ) |
| 4 | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 25 4 | + | 5 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 35 4 | ( | 5 2 | + | 1 | + | 3 2 | ) |
| 4 | × | 5 2 | + | 4 | × | 1 | + | 4 | × | 3 2 | + | 25 4 | + | 5 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 35 4 | ( | 5 2 | + | 1 | + | 3 2 | ) |
| 4 | × | 5 2 | + | 4 | × | 1 | + | 4 | × | 3 2 | + | 25 4 | + | 5 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 35 4 | × | 5 2 | + | 35 4 | × | 1 | + | 35 4 | × | 3 2 |
| 10 | + | 4 | + | 6 | + | 25 4 | + | 5 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | = | 175 8 | + | 35 4 | + | 105 8 |
105 4 | + | 5 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 175 4 |
| 方程两边同时乘以: | ( | 5 2 | + | 1 | + | 3 2 | ) |
105 4 | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 5 2 | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 175 4 | ( | 5 2 | + | 1 | + | 3 2 | ) |
105 4 | × | 5 2 | + | 105 4 | × | 1 | + | 105 4 | × | 3 2 | + | 5 2 | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 175 4 | ( | 5 2 | + | 1 | + | 3 2 | ) |
105 4 | × | 5 2 | + | 105 4 | × | 1 | + | 105 4 | × | 3 2 | + | 5 2 | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 175 4 | × | 5 2 | + | 175 4 | × | 1 | + | 175 4 | × | 3 2 |
525 8 | + | 105 4 | + | 315 8 | + | 5 2 | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 875 8 | + | 175 4 | + | 525 8 |
525 4 | + | 5 2 | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 875 4 |
| 方程两边同时乘以: | ( | 5 2 | + | 1 | + | 3 2 | ) |
525 4 | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 5 2 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 875 4 | ( | 5 2 | + | 1 | + | 3 2 | ) |
525 4 | × | 5 2 | + | 525 4 | × | 1 | + | 525 4 | × | 3 2 | + | 5 2 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 875 4 | ( | 5 2 | + | 1 | + | 3 2 | ) |
525 4 | × | 5 2 | + | 525 4 | × | 1 | + | 525 4 | × | 3 2 | + | 5 2 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 875 4 | × | 5 2 | + | 875 4 | × | 1 | + | 875 4 | × | 3 2 |
2625 8 | + | 525 4 | + | 1575 8 | + | 5 2 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 4375 8 | + | 875 4 | + | 2625 8 |
2625 4 | + | 5 2 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | ÷ | ( | 5 2 | + | 1 | + | 3 2 | ) | × | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | = | 4375 4 |
| 方程两边同时乘以: | ( | 5 2 | + | 1 | + | 3 2 | ) |
2625 4 | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 5 2 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | 15 4 | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | ( | 5 2 | + | 1 | + | 3 2 | ) | + | X | × | 3 2 | = | 4375 4 | ( | 5 2 | + | 1 | + | 3 2 | ) |
| X= | 3 2 |