12705983 50 | − | ( | 12705983 50 | ÷ | 109 100 | × | 9 100 | − | X | ÷ | 103 100 | × | 3 100 | ) | × | 28 25 | − | ( | 12705983 50 | ÷ | 109 100 | − | X | ÷ | 103 100 | ) | × | 1 4 | = | X |
方程左边 = | 12705983 50 | − | 12705983 50 | ÷ | 109 100 | × | 9 100 | × | 28 25 | + | X | ÷ | 103 100 | × | 3 100 | × | 28 25 | − | ( | 12705983 50 | ÷ | 109 100 | − | X | ÷ | 103 100 | ) | × | 1 4 |
= | 12705983 50 | − | 1600953858 68125 | + | X | × | 84 2575 | − | ( | 12705983 50 | ÷ | 109 100 | − | X | ÷ | 103 100 | ) | × | 1 4 |