X | − | X | × | 13 200 | − | ( | X | + | 2118868 5 | ) | × | 3 10000 | = | 2118868 5 |
方程左边 = | 187 200 | X | − | ( | X | + | 2118868 5 | ) | × | 3 10000 |
187 200 | X | − | ( | X | + | 2118868 5 | ) | × | 3 10000 | = | 2118868 5 |
方程左边 = | 187 200 | X | − | X | × | 3 10000 | − | 2118868 5 | × | 3 10000 |
= | 187 200 | X | − | X | × | 3 10000 | − | 1589151 12500 |
= | 9347 10000 | X | − | 1589151 12500 |
9347 10000 | X | − | 1589151 12500 | = | 2118868 5 |
9347 10000 | X | = | 2118868 5 | + | 1589151 12500 |