X | × | 113 100 | + | ( | 1 | − | X | ) | × | 103 100 | = | 988870 |
方程左边 = | 113 100 | X | + | 1 | × | 103 100 | − | X | × | 103 100 |
= | 113 100 | X | + | 103 100 | − | X | × | 103 100 |
= | 1 10 | X | + | 103 100 |
1 10 | X | + | 103 100 | = | 988870 |
1 10 | X | = | 988870 | − | 103 100 |
1 10 | X | = | 98886897 100 |
X | = | 98886897 100 | ÷ | 1 10 |
= | 98886897 100 | × | 10 |
= | 98886897 10 | × | 1 |
X | = | 98886897 10 |
X | = | 9888689.699999999 |