400 | − | ( | 500 | − | x | ) | ÷ | 109 100 | × | 9 100 | × | 28 25 | − | 100 | × | 3 5000 | = | x |
方程左边 = | 400 | − | ( | 500 | − | x | ) | × | 252 2725 | − | 3 50 |
= | 19997 50 | − | ( | 500 | − | x | ) | × | 252 2725 |
19997 50 | − | ( | 500 | − | x | ) | × | 252 2725 | = | x |
方程左边 = | 19997 50 | − | 500 | × | 252 2725 | + | x | × | 252 2725 |
= | 19997 50 | − | 5040 109 | + | x | × | 252 2725 |
= | 1927673 5450 | + | 252 2725 | x |
1927673 5450 | + | 252 2725 | x | = | x |
252 2725 | x | − | x | = | - | 1927673 5450 |
- | 2473 2725 | x | = | - | 1927673 5450 |
1927673 5450 | = | 2473 2725 | x |
2473 2725 | x | = | 1927673 5450 |
x | = | 1927673 5450 | ÷ | 2473 2725 |
= | 1927673 5450 | × | 2725 2473 |
= | 1927673 218 | × | 109 2473 |
x | = | 210116357 539114 |
x | = | 1927673 4946 |
x | = | 389.743833 |