1 10 | = | ( | 2 25 | ( | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ) | ÷ | ( | 1 | − | 2 25 | ( | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ) | ) | ) |
1 10 | = | 2 25 | ( | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ) | ÷ | ( | 1 | − | 2 25 | ( | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ) | ) |
方程两边同时乘以: | ( | 1 | − | 2 25 | ( | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ) | ) |
1 10 | ( | 1 | − | 2 25 | ( | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ) | ) | = | 2 25 | ( | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ) |
1 10 | × | 1 | − | 1 10 | × | 2 25 | ( | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ) | = | 2 25 | ( | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ) |
1 10 | × | 1 | − | 1 10 | × | 2 25 | ( | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ) | = | 2 25 | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) |
1 10 | − | 1 125 | ( | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ) | = | 2 25 | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) |
1 10 | − | 1 125 | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | = | 2 25 | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) |
1 10 | − | 1 125 | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | = | 2 25 | × | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | × | ( | 1 | − | X | ) |
1 10 | − | 1 125 | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | = | 2 25 | ÷ | ( | 7 10 | − | 3 20 | ) | × | ( | 1 | − | X | ) |
方程两边同时乘以: | ( | 7 10 | − | 3 20 | ) |
1 10 | ( | 7 10 | − | 3 20 | ) | − | 1 125 | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 2 25 | ( | 1 | − | X | ) |
1 10 | × | 7 10 | − | 1 10 | × | 3 20 | − | 1 125 | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 2 25 | ( | 1 | − | X | ) |
1 10 | × | 7 10 | − | 1 10 | × | 3 20 | − | 1 125 | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 2 25 | × | 1 | − | 2 25 | X |
7 100 | − | 3 200 | − | 1 125 | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 2 25 | − | 2 25 | X |
11 200 | − | 1 125 | ( | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | ) | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 2 25 | − | 2 25 | X |
11 200 | − | 1 125 | × | 1 | ÷ | ( | 7 10 | − | 3 20 | ) | × | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 2 25 | − | 2 25 | X |
11 200 | − | 1 125 | ÷ | ( | 7 10 | − | 3 20 | ) | × | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 2 25 | − | 2 25 | X |
方程两边同时乘以: | ( | 7 10 | − | 3 20 | ) |
11 200 | ( | 7 10 | − | 3 20 | ) | − | 1 125 | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 2 25 | ( | 7 10 | − | 3 20 | ) | − | 2 25 | X | ( | 7 10 | − | 3 20 | ) |
11 200 | × | 7 10 | − | 11 200 | × | 3 20 | − | 1 125 | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 2 25 | ( | 7 10 | − | 3 20 | ) | − | 2 25 | X | ( | 7 10 | − | 3 20 | ) |
11 200 | × | 7 10 | − | 11 200 | × | 3 20 | − | 1 125 | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 2 25 | × | 7 10 | − | 2 25 | × | 3 20 | − | 2 25 | X | ( | 7 10 | − | 3 20 | ) |
77 2000 | − | 33 4000 | − | 1 125 | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 7 125 | − | 3 250 | − | 2 25 | X | ( | 7 10 | − | 3 20 | ) |
121 4000 | − | 1 125 | ( | 1 | − | X | ) | ( | 7 10 | − | 3 20 | ) | = | 11 250 | − | 2 25 | X | ( | 7 10 | − | 3 20 | ) |
121 4000 | − | 1 125 | × | 1 | ( | 7 10 | − | 3 20 | ) | + | 1 125 | X | ( | 7 10 | − | 3 20 | ) | = | 11 250 | − | 2 25 | X | ( | 7 10 | − | 3 20 | ) |
121 4000 | − | 1 125 | × | 1 | ( | 7 10 | − | 3 20 | ) | + | 1 125 | X | ( | 7 10 | − | 3 20 | ) | = | 11 250 | − | 2 25 | X | × | 7 10 | + | 2 25 | X | × | 3 20 |
X1= | 3 8 |