X | − | X | ÷ | 101 100 | × | 1 100 | × | 11 10 | − | ( | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | ÷ | ( | 1047 2 | + | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | ) | × | 30 100 | + | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 20 100 | − | X | × | 1 2000 | = | 680 |
X | − | X | ÷ | 101 100 | × | 1 100 | × | 11 10 | − | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | ÷ | ( | 1047 2 | + | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 30 100 | + | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 20 100 | − | X | × | 1 2000 | = | 680 |
X | − | X | × | 11 1010 | − | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | ÷ | ( | 1047 2 | + | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 30 100 | + | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 20 100 | − | X | × | 1 2000 | = | 680 |
199699 202000 | X | − | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | ÷ | ( | 1047 2 | + | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 30 100 | + | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 20 100 | = | 680 |
方程两边同时乘以: | ( | 1047 2 | + | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) |
199699 202000 | X | ( | 1047 2 | + | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | − | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 30 100 | + | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 20 100 | ( | 1047 2 | + | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | = | 680 | ( | 1047 2 | + | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) |
199699 202000 | X | × | 1047 2 | + | 199699 202000 | X | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | − | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 30 100 | + | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | = | 680 | ( | 1047 2 | + | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) |
199699 202000 | X | × | 1047 2 | + | 199699 202000 | X | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | − | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 30 100 | + | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | = | 680 | × | 1047 2 | + | 680 | X | ÷ | 101 100 | × | 1 100 | × | 1 10 |
209084853 404000 | X | + | 199699 204020000 | X | X | − | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 30 100 | + | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 20 100 | ( | 1047 2 | + | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | = | 355980 | + | 68 101 | X |
209084853 404000 | X | + | 199699 204020000 | X | X | − | X | ÷ | 101 100 | × | 30 100 | + | 1047 2 | × | 30 100 | + | X | ÷ | 101 100 | = | 355980 | + | 68 101 | X |
209084853 404000 | X | + | 199699 204020000 | X | X | − | X | × | 30 101 | + | 3141 20 | + | X | × | 3 10100 | + | ( | X | ÷ | 101 100 | − | 1047 2 | − | X | ÷ | 101 100 | × | 1 100 | × | 1 10 | ) | × | 20 100 | = | 355980 | + | 68 101 | X |