1 | ÷ | x | + | 1 | ÷ | ( | x | + | 15 | ) | = | 1 | ÷ | 4 |
方程两边同时乘以: | x |
1 | + | 1 | ÷ | ( | x | + | 15 | ) | × | x | = | 1 | ÷ | 4 | × | x |
方程两边同时乘以: | ( | x | + | 15 | ) |
1 | ( | x | + | 15 | ) | + | 1 | x | = | 1 | ÷ | 4 | × | x | ( | x | + | 15 | ) |
1 | x | + | 1 | × | 15 | + | 1 | x | = | 1 | ÷ | 4 | × | x | ( | x | + | 15 | ) |
1 | x | + | 1 | × | 15 | + | 1 | x | = | 1 | ÷ | 4 | × | x | x | + | 1 | ÷ | 4 | × | x | × | 15 |
1 | x | + | 15 | + | 1 | x | = | 1 4 | x | x | + | 15 4 | x |
2 | x | + | 15 | = | 1 4 | x | x | + | 15 4 | x |