( | X | − | 1000 | × | 3 50 | − | 2000 | × | 7 100 | ) | ( | 1 | − | 1 4 | ) | ÷ | 1000 | = | ( | X | − | 1000 | × | 3 50 | ) | ( | 1 | − | 1 4 | ) | ÷ | ( | 1000 | + | 200 | ) |
方程两边同时乘以: | ( | 1000 | + | 200 | ) |
( | X | − | 1000 | × | 3 50 | − | 2000 | × | 7 100 | ) | ( | 1 | − | 1 4 | ) | ÷ | 1000 | × | ( | 1000 | + | 200 | ) | = | ( | X | − | 1000 | × | 3 50 | ) | ( | 1 | − | 1 4 | ) |
X | ( | 1 | − | 1 4 | ) | ÷ | 1000 | × | ( | 1000 | + | 200 | ) | − | 1000 | × | 3 50 | ( | 1 | − | 1 4 | ) | ÷ | 1000 | × | ( | 1000 | + | 200 | ) | − | 2000 | × | 7 100 | ( | 1 | − | 1 4 | ) | = | ( | X | − | 1000 | × | 3 50 | ) | ( | 1 | − | 1 4 | ) |
X | ( | 1 | − | 1 4 | ) | ÷ | 1000 | × | ( | 1000 | + | 200 | ) | − | 1000 | × | 3 50 | ( | 1 | − | 1 4 | ) | ÷ | 1000 | × | ( | 1000 | + | 200 | ) | − | 2000 | × | 7 100 | ( | 1 | − | 1 4 | ) | = | X | ( | 1 | − | 1 4 | ) | − | 1000 | × | 3 50 | ( | 1 | − | 1 4 | ) |
X | ( | 1 | − | 1 4 | ) | × | 1 1000 | ( | 1000 | + | 200 | ) | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | X | ( | 1 | − | 1 4 | ) | − | 60 | ( | 1 | − | 1 4 | ) |
X | × | 1 | × | 1 1000 | ( | 1000 | + | 200 | ) | − | X | × | 1 4 | × | 1 1000 | ( | 1000 | + | 200 | ) | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | − | 7 50 | = | X | ( | 1 | − | 1 4 | ) | − | 60 | ( | 1 | − | 1 4 | ) |
X | × | 1 | × | 1 1000 | ( | 1000 | + | 200 | ) | − | X | × | 1 4 | × | 1 1000 | ( | 1000 | + | 200 | ) | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | − | 7 50 | = | X | × | 1 | − | X | × | 1 4 | − | 60 | ( | 1 | − | 1 4 | ) |
X | × | 1 1000 | ( | 1000 | + | 200 | ) | − | X | × | 1 4000 | ( | 1000 | + | 200 | ) | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | X | × | 1 | − | X | × | 1 4 | − | 60 | ( | 1 | − | 1 4 | ) |
X | × | 1 1000 | ( | 1000 | + | 200 | ) | − | X | × | 1 4000 | ( | 1000 | + | 200 | ) | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 60 | ( | 1 | − | 1 4 | ) |
X | × | 1 1000 | × | 1000 | + | X | × | 1 1000 | × | 200 | − | X | × | 1 4000 | ( | 1000 | + | 200 | ) | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 60 | ( | 1 | − | 1 4 | ) |
X | × | 1 1000 | × | 1000 | + | X | × | 1 1000 | × | 200 | − | X | × | 1 4000 | ( | 1000 | + | 200 | ) | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 60 | × | 1 | + | 60 | × | 1 4 |
X | × | 1 | + | X | × | 1 5 | − | X | × | 1 4000 | ( | 1000 | + | 200 | ) | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | = | 3 4 | X | − | 60 | + | 15 |
6 5 | X | − | X | × | 1 4000 | ( | 1000 | + | 200 | ) | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
6 5 | X | − | X | × | 1 4000 | × | 1000 | − | X | × | 1 4000 | × | 200 | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | − | 7 50 | = | 3 4 | X | − | 45 |
6 5 | X | − | X | × | 1 4 | − | X | × | 1 20 | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
9 10 | X | − | 3 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
9 10 | X | − | 3 50 | × | 1 | ( | 1000 | + | 200 | ) | + | 3 50 | × | 1 4 | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
9 10 | X | − | 3 50 | ( | 1000 | + | 200 | ) | + | 3 200 | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
9 10 | X | − | 3 50 | × | 1000 | − | 3 50 | × | 200 | + | 3 200 | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
9 10 | X | − | 60 | − | 12 | + | 3 200 | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
9 10 | X | − | 72 | + | 3 200 | ( | 1000 | + | 200 | ) | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
9 10 | X | − | 72 | + | 3 200 | × | 1000 | + | 3 200 | × | 200 | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
9 10 | X | − | 72 | + | 15 | + | 3 | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
9 10 | X | − | 54 | − | 7 50 | ( | 1 | − | 1 4 | ) | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
9 10 | X | − | 54 | − | 7 50 | × | 1 | ( | 1000 | + | 200 | ) | + | 7 50 | × | 1 4 | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |
9 10 | X | − | 54 | − | 7 50 | ( | 1000 | + | 200 | ) | + | 7 200 | ( | 1000 | + | 200 | ) | = | 3 4 | X | − | 45 |