847 25 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | + | 1 20 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 13 | ) | = | 3239 100 |
| 方程两边同时乘以: | ( | 1 | + | X | ÷ | 12 | × | 3 | ) |
847 25 | + | 1 20 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 13 | ) | × | ( | 1 | + | X | ÷ | 12 | × | 3 | ) | = | 3239 100 | ( | 1 | + | X | ÷ | 12 | × | 3 | ) |
847 25 | + | 1 20 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 13 | ) | × | 1 | + | 1 20 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 13 | ) | × | X | ÷ | 12 | × | 3 | = | 3239 100 | ( | 1 | + | X | ÷ | 12 | × | 3 | ) |
847 25 | + | 1 20 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 13 | ) | × | 1 | + | 1 20 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 13 | ) | × | X | ÷ | 12 | × | 3 | = | 3239 100 | × | 1 | + | 3239 100 | X | ÷ | 12 | × | 3 |
847 25 | + | 1 20 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 13 | ) | + | 1 80 | ÷ | ( | 1 | + | X | ÷ | 12 | × | 13 | ) | × | X | = | 3239 100 | + | 3239 400 | X |
| 方程两边同时乘以: | ( | 1 | + | X | ÷ | 12 | × | 13 | ) |
847 25 | ( | 1 | + | X | ÷ | 12 | × | 13 | ) | + | 1 20 | + | 1 80 | X | = | 3239 100 | ( | 1 | + | X | ÷ | 12 | × | 13 | ) | + | 3239 400 | X | ( | 1 | + | X | ÷ | 12 | × | 13 | ) |
847 25 | × | 1 | + | 847 25 | X | ÷ | 12 | × | 13 | + | 1 20 | + | 1 80 | X | = | 3239 100 | ( | 1 | + | X | ÷ | 12 | × | 13 | ) | + | 3239 400 | X | ( | 1 | + | X | ÷ | 12 | × | 13 | ) |
847 25 | × | 1 | + | 847 25 | X | ÷ | 12 | × | 13 | + | 1 20 | + | 1 80 | X | = | 3239 100 | × | 1 | + | 3239 100 | X | ÷ | 12 | × | 13 | + | 3239 400 | X | ( | 1 | + | X | ÷ | 12 | × | 13 | ) |
847 25 | + | 11011 300 | X | + | 1 20 | + | 1 80 | X | = | 3239 100 | + | 42107 1200 | X | + | 3239 400 | X | ( | 1 | + | X | ÷ | 12 | × | 13 | ) |
3393 100 | + | 44059 1200 | X | = | 3239 100 | + | 42107 1200 | X | + | 3239 400 | X | ( | 1 | + | X | ÷ | 12 | × | 13 | ) |
3393 100 | + | 44059 1200 | X | = | 3239 100 | + | 42107 1200 | X | + | 3239 400 | X | × | 1 | + | 3239 400 | X | X | ÷ | 12 | × | 13 |
3393 100 | + | 44059 1200 | X | = | 3239 100 | + | 42107 1200 | X | + | 3239 400 | X | + | 42107 4800 | X | X |
3393 100 | + | 44059 1200 | X | = | 3239 100 | + | 3239 75 | X | + | 42107 4800 | X | X |