157 100 | × | 9 | ( | X | ) | + | 31 20 | × | 30 | ( | X | − | 100 | ) | + | 31 20 | × | 90 | × | 1400 | + | 156 | × | 157 100 | × | 1200 | = | 600000 |
方程左边 = | 1413 100 | ( | X | ) | + | 93 2 | ( | X | − | 100 | ) | + | 195300 | + | 293904 |
= | 1413 100 | ( | X | ) | + | 93 2 | ( | X | − | 100 | ) | + | 489204 |
1413 100 | ( | X | ) | + | 93 2 | ( | X | − | 100 | ) | + | 489204 | = | 600000 |
方程左边 = | 1413 100 | X | + | 93 2 | ( | X | − | 100 | ) | + | 489204 |
= | 1413 100 | X | + | 93 2 | X | − | 93 2 | × | 100 | + | 489204 |
= | 1413 100 | X | + | 93 2 | X | − | 4650 | + | 489204 |
= | 6063 100 | X | + | 484554 |
6063 100 | X | + | 484554 | = | 600000 |
6063 100 | X | = | 600000 | − | 484554 |
6063 100 | X | = | 115446 |
X | = | 115446 | ÷ | 6063 100 |
= | 115446 | × | 100 6063 |
= | 38482 | × | 100 2021 |
X | = | 3848200 2021 |
X | = | 1904.106878 |