| ( | X | − | ( | 199599904 5 | ) | − | ( | 9 100 | X | − | ( | 90905421 25 | ) | ) | ( | 1 | + | 12 100 | ) | ) | ( | 1 | − | 0 | ) | ÷ | X | = | 6 100 |
| 方程两边同时乘以: | X |
| ( | X | − | ( | 199599904 5 | ) | − | ( | 9 100 | X | − | ( | 90905421 25 | ) | ) | ( | 1 | + | 12 100 | ) | ) | ( | 1 | − | 0 | ) | = | 6 100 | X |
| X | ( | 1 | − | 0 | ) | − | ( | 199599904 5 | ) | ( | 1 | − | 0 | ) | − | ( | 9 100 | X | − | ( | 90905421 25 | ) | ) | ( | 1 | + | 12 100 | ) | ( | 1 | − | 0 | ) | = | 6 100 | X |
| X | × | 1 | − | X | × | 0 | − | ( | 199599904 5 | ) | ( | 1 | − | 0 | ) | − | ( | 9 100 | X | − | ( | 90905421 25 | ) | ) | ( | 1 | + | 12 100 | ) | ( | 1 | − | 0 | ) | = | 6 100 | X |
| 1 | X | − | ( | 199599904 5 | ) | ( | 1 | − | 0 | ) | − | ( | 9 100 | X | − | ( | 90905421 25 | ) | ) | ( | 1 | + | 12 100 | ) | ( | 1 | − | 0 | ) | = | 6 100 | X |
| 1 | X | − | 199599904 5 | ( | 1 | − | 0 | ) | − | ( | 9 100 | X | − | ( | 90905421 25 | ) | ) | ( | 1 | + | 12 100 | ) | ( | 1 | − | 0 | ) | = | 6 100 | X |
| 1 | X | − | 199599904 5 | × | 1 | + | 199599904 5 | × | 0 | − | ( | 9 100 | X | − | ( | 90905421 25 | ) | ) | ( | 1 | + | 12 100 | ) | ( | 1 | − | 0 | ) | = | 6 100 | X |
| 1 | X | − | 199599904 5 | + | 0 | − | ( | 9 100 | X | − | ( | 90905421 25 | ) | ) | ( | 1 | + | 12 100 | ) | ( | 1 | − | 0 | ) | = | 6 100 | X |