735294117647 1000000000000 | X | × | 7 10 | ÷ | ( | 1 | − | 735294117647 1000000000000 | X | × | 7 10 | ) | = | 1 5 |
方程两边同时乘以: | ( | 1 | − | 735294117647 1000000000000 | X | × | 7 10 | ) |
735294117647 1000000000000 | X | × | 7 10 | = | 1 5 | ( | 1 | − | 735294117647 1000000000000 | X | × | 7 10 | ) |
735294117647 1000000000000 | X | × | 7 10 | = | 1 5 | × | 1 | − | 1 5 | × | 735294117647 1000000000000 | X | × | 7 10 |