| 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 11 | ) | = | 50000 |
| 方程两边同时乘以: | ( | 1 | + | x | ÷ | 12 | × | 6 | ) |
| 25950 | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | = | 50000 | ( | 1 | + | x | ÷ | 12 | × | 6 | ) |
| 25950 | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | × | 1 | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | × | x | ÷ | 12 | × | 6 | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | = | 50000 | ( | 1 | + | x | ÷ | 12 | × | 6 | ) |
| 25950 | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | × | 1 | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | × | x | ÷ | 12 | × | 6 | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | = | 50000 | × | 1 | + | 50000 | x | ÷ | 12 | × | 6 |
| 25950 | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | + | 12975 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | × | x | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | = | 50000 | + | 25000 | x |
| 方程两边同时乘以: | ( | 1 | + | x | ÷ | 12 | × | 7 | ) |
| 25950 | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | + | 25950 | + | 12975 | x | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | = | 50000 | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | + | 25000 | x | ( | 1 | + | x | ÷ | 12 | × | 7 | ) |
| 25950 | × | 1 | + | 25950 | x | ÷ | 12 | × | 7 | + | 25950 | + | 12975 | x | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | = | 50000 | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | + | 25000 | x | ( | 1 | + | x | ÷ | 12 | × | 7 | ) |
| 25950 | × | 1 | + | 25950 | x | ÷ | 12 | × | 7 | + | 25950 | + | 12975 | x | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | = | 50000 | × | 1 | + | 50000 | x | ÷ | 12 | × | 7 | + | 25000 | x | ( | 1 | + | x | ÷ | 12 | × | 7 | ) |
| 25950 | + | 30275 2 | x | + | 25950 | + | 12975 | x | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | = | 50000 | + | 87500 3 | x | + | 25000 | x | ( | 1 | + | x | ÷ | 12 | × | 7 | ) |
| 51900 | + | 56225 2 | x | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | + | 25950 | = | 50000 | + | 87500 3 | x | + | 25000 | x | ( | 1 | + | x | ÷ | 12 | × | 7 | ) |
| 方程两边同时乘以: | ( | 1 | + | x | ÷ | 12 | × | 8 | ) |
| 51900 | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 56225 2 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 25950 | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | = | 50000 | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 87500 3 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 25000 | x | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | ( | 1 | + | x | ÷ | 12 | × | 8 | ) |
| 51900 | × | 1 | + | 51900 | x | ÷ | 12 | × | 8 | + | 56225 2 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 25950 | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | = | 50000 | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 87500 3 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 25000 | x | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | ( | 1 | + | x | ÷ | 12 | × | 8 | ) |
| 51900 | × | 1 | + | 51900 | x | ÷ | 12 | × | 8 | + | 56225 2 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 25950 | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | = | 50000 | × | 1 | + | 50000 | x | ÷ | 12 | × | 8 | + | 87500 3 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 25000 | x | ( | 1 | + | x | ÷ | 12 | × | 7 | ) |
| 51900 | + | 34600 | x | + | 56225 2 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 25950 | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | + | 25950 | ÷ | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | × | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | = | 50000 | + | 100000 3 | x | + | 87500 3 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | + | 25000 | x | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | ( | 1 | + | x | ÷ | 12 | × | 8 | ) |
| 方程两边同时乘以: | ( | 1 | + | x | ÷ | 12 | × | 9 | ) |
| 51900 | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 34600 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 56225 2 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 25950 | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | ( | 1 | + | x | ÷ | 12 | × | 7 | ) | = | 50000 | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 100000 3 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 87500 3 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 25000 | x | ( | 1 | + | x | ÷ | 12 | × | 7 | ) |
| 51900 | × | 1 | + | 51900 | x | ÷ | 12 | × | 9 | + | 34600 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 56225 2 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | = | 50000 | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 100000 3 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 87500 3 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 25000 | x | ( | 1 | + | x | ÷ | 12 | × | 7 | ) |
| 51900 | × | 1 | + | 51900 | x | ÷ | 12 | × | 9 | + | 34600 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 56225 2 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | = | 50000 | × | 1 | + | 50000 | x | ÷ | 12 | × | 9 | + | 100000 3 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 87500 3 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) |
| 51900 | + | 38925 | x | + | 34600 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 56225 2 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 25950 | ( | 1 | + | x | ÷ | 12 | × | 6 | ) | = | 50000 | + | 37500 | x | + | 100000 3 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 87500 3 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | + | 25000 | x |
| 方程两边同时乘以: | ( | 1 | + | x | ÷ | 12 | × | 10 | ) |
| 51900 | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 38925 | x | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 34600 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 56225 2 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) | = | 50000 | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 37500 | x | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 100000 3 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 87500 3 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) |
| 51900 | × | 1 | + | 51900 | x | ÷ | 12 | × | 10 | + | 38925 | x | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 34600 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | = | 50000 | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 37500 | x | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 100000 3 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 87500 3 | x | ( | 1 | + | x | ÷ | 12 | × | 8 | ) |
| 51900 | × | 1 | + | 51900 | x | ÷ | 12 | × | 10 | + | 38925 | x | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 34600 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | = | 50000 | × | 1 | + | 50000 | x | ÷ | 12 | × | 10 | + | 37500 | x | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 100000 3 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) |
| 51900 | + | 43250 | x | + | 38925 | x | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 34600 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 56225 2 | x | = | 50000 | + | 125000 3 | x | + | 37500 | x | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 100000 3 | x | ( | 1 | + | x | ÷ | 12 | × | 9 | ) | ( | 1 | + | x | ÷ | 12 | × | 10 | ) | + | 87500 3 | x |