| ( | x | − | 80 | ) | ( | 1 | − | 33 100 | ) | ÷ | ( | 4000 | + | 200 | ) | = | ( | x | − | 160 | ) | ( | 1 | − | 33 100 | ) | ÷ | 4000 |
| 方程两边同时乘以: | ( | 4000 | + | 200 | ) |
| ( | x | − | 80 | ) | ( | 1 | − | 33 100 | ) | = | ( | x | − | 160 | ) | ( | 1 | − | 33 100 | ) | ÷ | 4000 | × | ( | 4000 | + | 200 | ) |
| x | ( | 1 | − | 33 100 | ) | − | 80 | ( | 1 | − | 33 100 | ) | = | ( | x | − | 160 | ) | ( | 1 | − | 33 100 | ) | ÷ | 4000 | × | ( | 4000 | + | 200 | ) |
| x | ( | 1 | − | 33 100 | ) | − | 80 | ( | 1 | − | 33 100 | ) | = | x | ( | 1 | − | 33 100 | ) | ÷ | 4000 | × | ( | 4000 | + | 200 | ) | − | 160 | ( | 1 | − | 33 100 | ) | ÷ | 4000 | × | ( | 4000 | + | 200 | ) |
| x | ( | 1 | − | 33 100 | ) | − | 80 | ( | 1 | − | 33 100 | ) | = | x | ( | 1 | − | 33 100 | ) | × | 1 4000 | ( | 4000 | + | 200 | ) | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
| x | × | 1 | − | x | × | 33 100 | − | 80 | ( | 1 | − | 33 100 | ) | = | x | ( | 1 | − | 33 100 | ) | × | 1 4000 | ( | 4000 | + | 200 | ) | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
| x | × | 1 | − | x | × | 33 100 | − | 80 | ( | 1 | − | 33 100 | ) | = | x | × | 1 | × | 1 4000 | ( | 4000 | + | 200 | ) | − | x | × | 33 100 | × | 1 4000 | ( | 4000 | + | 200 | ) | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
| x | × | 1 | − | x | × | 33 100 | − | 80 | ( | 1 | − | 33 100 | ) | = | x | × | 1 4000 | ( | 4000 | + | 200 | ) | − | x | × | 33 400000 | ( | 4000 | + | 200 | ) | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
67 100 | x | − | 80 | ( | 1 | − | 33 100 | ) | = | x | × | 1 4000 | ( | 4000 | + | 200 | ) | − | x | × | 33 400000 | ( | 4000 | + | 200 | ) | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
67 100 | x | − | 80 | × | 1 | + | 80 | × | 33 100 | = | x | × | 1 4000 | ( | 4000 | + | 200 | ) | − | x | × | 33 400000 | ( | 4000 | + | 200 | ) | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
67 100 | x | − | 80 | × | 1 | + | 80 | × | 33 100 | = | x | × | 1 4000 | × | 4000 | + | x | × | 1 4000 | × | 200 | − | x | × | 33 400000 | ( | 4000 | + | 200 | ) | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
67 100 | x | − | 80 | + | 132 5 | = | x | × | 1 | + | x | × | 1 20 | − | x | × | 33 400000 | ( | 4000 | + | 200 | ) | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
67 100 | x | − | 268 5 | = | 21 20 | x | − | x | × | 33 400000 | ( | 4000 | + | 200 | ) | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
67 100 | x | − | 268 5 | = | 21 20 | x | − | x | × | 33 400000 | × | 4000 | − | x | × | 33 400000 | × | 200 | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
67 100 | x | − | 268 5 | = | 21 20 | x | − | x | × | 33 100 | − | x | × | 33 2000 | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
67 100 | x | − | 268 5 | = | 1407 2000 | x | − | 1 25 | ( | 1 | − | 33 100 | ) | ( | 4000 | + | 200 | ) |
67 100 | x | − | 268 5 | = | 1407 2000 | x | − | 1 25 | × | 1 | ( | 4000 | + | 200 | ) | + | 1 25 | × | 33 100 | ( | 4000 | + | 200 | ) |
67 100 | x | − | 268 5 | = | 1407 2000 | x | − | 1 25 | ( | 4000 | + | 200 | ) | + | 33 2500 | ( | 4000 | + | 200 | ) |
67 100 | x | − | 268 5 | = | 1407 2000 | x | − | 1 25 | × | 4000 | − | 1 25 | × | 200 | + | 33 2500 | ( | 4000 | + | 200 | ) |
67 100 | x | − | 268 5 | = | 1407 2000 | x | − | 160 | − | 8 | + | 33 2500 | ( | 4000 | + | 200 | ) |
67 100 | x | − | 268 5 | = | 1407 2000 | x | − | 168 | + | 33 2500 | ( | 4000 | + | 200 | ) |
67 100 | x | − | 268 5 | = | 1407 2000 | x | − | 168 | + | 33 2500 | × | 4000 | + | 33 2500 | × | 200 |
67 100 | x | − | 268 5 | = | 1407 2000 | x | − | 168 | + | 264 5 | + | 66 25 |
67 100 | x | − | 268 5 | = | 1407 2000 | x | − | 2814 25 |
67 100 | x | − | 1407 2000 | x | = | - | 2814 25 | + | 268 5 |
| - | 67 2000 | x | = | - | 2814 25 | + | 268 5 |
| - | 67 2000 | x | = | - | 1474 25 |
1474 25 | = | 67 2000 | x |
67 2000 | x | = | 1474 25 |
| x | = | 1474 25 | ÷ | 67 2000 |
| = | 1474 25 | × | 2000 67 |
| = | 22 | × | 80 |
| x | = | 1760 |