20 100 | − | 15 100 | − | ( | ( | 1 | + | x | ) | ÷ | x | ) | × | 10 100 | × | 40 100 | = | 0 |
20 100 | − | 15 100 | − | ( | 1 | + | x | ) | ÷ | x | × | 10 100 | × | 40 100 | = | 0 |
20 100 | − | 15 100 | − | ( | 1 | + | x | ) | ÷ | x | × | 1 25 | = | 0 |
1 20 | − | ( | 1 | + | x | ) | ÷ | x | × | 1 25 | = | 0 |
方程两边同时乘以: | x |
1 20 | x | − | ( | 1 | + | x | ) | × | 1 25 | = | 0 |
1 20 | x | − | 1 | × | 1 25 | − | x | × | 1 25 | = | 0 |
1 20 | x | − | 1 25 | − | x | × | 1 25 | = | 0 |
1 100 | x | − | 1 25 | = | 0 |
1 100 | x | = | 0 | + | 1 25 |
1 100 | x | = | 1 25 |
x | = | 1 25 | ÷ | 1 100 |
= | 1 25 | × | 100 |
= | 1 | × | 4 |
x | = | 4 |