X | − | 2749 5 | − | ( | ( | X | − | 5000 | − | 216 | − | 2749 5 | ) | × | 3 100 | ) | = | 0 |
方程左边 = | X | − | 2749 5 | − | ( | X | − | 5000 | − | 216 | − | 2749 5 | ) | × | 3 100 |
= | X | − | 2749 5 | − | X | × | 3 100 | + | 5000 | × | 3 100 | + | 216 | × | 3 100 | + | 2749 5 | × | 3 100 |
= | X | − | 2749 5 | − | X | × | 3 100 | + | 150 | + | 162 25 | + | 8247 500 |
= | 97 100 | X | − | 188413 500 |
97 100 | X | − | 188413 500 | = | 0 |
97 100 | X | = | 0 | + | 188413 500 |
97 100 | X | = | 188413 500 |
X | = | 188413 500 | ÷ | 97 100 |
= | 188413 500 | × | 100 97 |
= | 188413 5 | × | 1 97 |
X | = | 188413 485 |
X | = | 388.480412 |