x | = | 1 5 | ( | 1 | − | 3 5 | ( | 1 | − | 13 50 | ) | ) | − | 1 4 | × | 1 5 | × | 1 5 | × | 87 100 |
方程右边 = | 1 5 | ( | 1 | − | 3 5 | ( | 1 | − | 13 50 | ) | ) | − | 87 10000 |
x | = | 1 5 | ( | 1 | − | 3 5 | ( | 1 | − | 13 50 | ) | ) | − | 87 10000 |
方程右边 = | 1 5 | × | 1 | − | 1 5 | × | 3 5 | ( | 1 | − | 13 50 | ) | − | 87 10000 |
= | 1 5 | − | 3 25 | ( | 1 | − | 13 50 | ) | − | 87 10000 |
= | 1913 10000 | − | 3 25 | ( | 1 | − | 13 50 | ) |
= | 1913 10000 | − | 3 25 | × | 1 | + | 3 25 | × | 13 50 |
= | 1913 10000 | − | 3 25 | + | 39 1250 |
= | 41 400 |
x | = | 41 400 |