1 5 | ( | x | + | 5 | ) | = | 180 | ÷ | ( | x | + | 5 | ) |
方程两边同时乘以: | ( | x | + | 5 | ) |
1 5 | ( | x | + | 5 | ) | ( | x | + | 5 | ) | = | 180 |
1 5 | x | ( | x | + | 5 | ) | + | 1 5 | × | 5 | ( | x | + | 5 | ) | = | 180 |
1 5 | x | ( | x | + | 5 | ) | + | 1 | ( | x | + | 5 | ) | = | 180 |
1 5 | x | x | + | 1 5 | x | × | 5 | + | 1 | ( | x | + | 5 | ) | = | 180 |
1 5 | x | x | + | 1 | x | + | 1 | ( | x | + | 5 | ) | = | 180 |
1 5 | x | x | + | 1 | x | + | 1 | x | + | 1 | × | 5 | = | 180 |
1 5 | x | x | + | 1 | x | + | 1 | x | + | 5 | = | 180 |
1 5 | x | x | + | 2 | x | + | 5 | = | 180 |