2 5 | − | ( | ( | 1 | + | x | ) | ÷ | x | × | 7 200 | ) | = | 0 |
2 5 | − | ( | 1 | + | x | ) | ÷ | x | × | 7 200 | = | 0 |
方程两边同时乘以: | x |
2 5 | x | − | ( | 1 | + | x | ) | × | 7 200 | = | 0 |
2 5 | x | − | 1 | × | 7 200 | − | x | × | 7 200 | = | 0 |
2 5 | x | − | 7 200 | − | x | × | 7 200 | = | 0 |
73 200 | x | − | 7 200 | = | 0 |
73 200 | x | = | 0 | + | 7 200 |
73 200 | x | = | 7 200 |
x | = | 7 200 | ÷ | 73 200 |
= | 7 200 | × | 200 73 |
= | 7 | × | 1 73 |
x | = | 7 73 |
x | = | 0.09589 |