1 10 | = | 4 5 | ( | 1 | − | x | ) | ÷ | ( | 7 10 | − | 3 20 | ) | − | 4 5 | ( | 1 | − | x | ) |
方程两边同时乘以: | ( | 7 10 | − | 3 20 | ) |
1 10 | ( | 7 10 | − | 3 20 | ) | = | 4 5 | ( | 1 | − | x | ) | − | 4 5 | ( | 1 | − | x | ) | ( | 7 10 | − | 3 20 | ) |
1 10 | × | 7 10 | − | 1 10 | × | 3 20 | = | 4 5 | ( | 1 | − | x | ) | − | 4 5 | ( | 1 | − | x | ) | ( | 7 10 | − | 3 20 | ) |
1 10 | × | 7 10 | − | 1 10 | × | 3 20 | = | 4 5 | × | 1 | − | 4 5 | x | − | 4 5 | ( | 1 | − | x | ) | ( | 7 10 | − | 3 20 | ) |
7 100 | − | 3 200 | = | 4 5 | − | 4 5 | x | − | 4 5 | ( | 1 | − | x | ) | ( | 7 10 | − | 3 20 | ) |
11 200 | = | 4 5 | − | 4 5 | x | − | 4 5 | ( | 1 | − | x | ) | ( | 7 10 | − | 3 20 | ) |
11 200 | = | 4 5 | − | 4 5 | x | − | 4 5 | × | 1 | ( | 7 10 | − | 3 20 | ) | + | 4 5 | x | ( | 7 10 | − | 3 20 | ) |
11 200 | = | 4 5 | − | 4 5 | x | − | 4 5 | ( | 7 10 | − | 3 20 | ) | + | 4 5 | x | ( | 7 10 | − | 3 20 | ) |
11 200 | = | 4 5 | − | 4 5 | x | − | 4 5 | × | 7 10 | + | 4 5 | × | 3 20 | + | 4 5 | x | ( | 7 10 | − | 3 20 | ) |
11 200 | = | 4 5 | − | 4 5 | x | − | 14 25 | + | 3 25 | + | 4 5 | x | ( | 7 10 | − | 3 20 | ) |
11 200 | = | 9 25 | − | 4 5 | x | + | 4 5 | x | ( | 7 10 | − | 3 20 | ) |
11 200 | = | 9 25 | − | 4 5 | x | + | 4 5 | x | × | 7 10 | − | 4 5 | x | × | 3 20 |
11 200 | = | 9 25 | − | 4 5 | x | + | 14 25 | x | − | 3 25 | x |
11 200 | = | 9 25 | − | 9 25 | x |
9 25 | x | = | 9 25 | − | 11 200 |
9 25 | x | = | 61 200 |
x | = | 61 200 | ÷ | 9 25 |
= | 61 200 | × | 25 9 |
= | 61 8 | × | 1 9 |
x | = | 61 72 |
x | = | 0.847222 |