| ( | 5 | ( | x | + | 530 | ) | ) | ÷ | ( | x | + | 530 | + | 1200 | ) | = | ( | 5 | × | 530 | ) | ÷ | ( | 530 | + | 1200 | ) | + | 2 5 |
| 方程两边同时乘以: | ( | x | + | 530 | + | 1200 | ) | , | ( | 530 | + | 1200 | ) |
| ( | 5 | ( | x | + | 530 | ) | ) | ( | 530 | + | 1200 | ) | = | ( | 5 | × | 530 | ) | ( | x | + | 530 | + | 1200 | ) | + | 2 5 | ( | x | + | 530 | + | 1200 | ) | ( | 530 | + | 1200 | ) |
| 5 | ( | x | + | 530 | ) | ( | 530 | + | 1200 | ) | = | ( | 5 | × | 530 | ) | ( | x | + | 530 | + | 1200 | ) | + | 2 5 | ( | x | + | 530 | + | 1200 | ) | ( | 530 | + | 1200 | ) |
| 5 | ( | x | + | 530 | ) | ( | 530 | + | 1200 | ) | = | 5 | × | 530 | ( | x | + | 530 | + | 1200 | ) | + | 2 5 | ( | x | + | 530 | + | 1200 | ) | ( | 530 | + | 1200 | ) |
| 5 | ( | x | + | 530 | ) | ( | 530 | + | 1200 | ) | = | 2650 | ( | x | + | 530 | + | 1200 | ) | + | 2 5 | ( | x | + | 530 | + | 1200 | ) | ( | 530 | + | 1200 | ) |
| 5 | x | ( | 530 | + | 1200 | ) | + | 5 | × | 530 | ( | 530 | + | 1200 | ) | = | 2650 | ( | x | + | 530 | + | 1200 | ) | + | 2 5 | ( | x | + | 530 | + | 1200 | ) | ( | 530 | + | 1200 | ) |
| 5 | x | ( | 530 | + | 1200 | ) | + | 5 | × | 530 | ( | 530 | + | 1200 | ) | = | 2650 | x | + | 2650 | × | 530 | + | 2650 | × | 1200 | + | 2 5 | ( | x | + | 530 | + | 1200 | ) | ( | 530 | + | 1200 | ) |
| 5 | x | ( | 530 | + | 1200 | ) | + | 2650 | ( | 530 | + | 1200 | ) | = | 2650 | x | + | 1404500 | + | 3180000 | + | 2 5 | ( | x | + | 530 | + | 1200 | ) | ( | 530 | + | 1200 | ) |
| 5 | x | ( | 530 | + | 1200 | ) | + | 2650 | ( | 530 | + | 1200 | ) | = | 2650 | x | + | 4584500 | + | 2 5 | ( | x | + | 530 | + | 1200 | ) | ( | 530 | + | 1200 | ) |
| 5 | x | × | 530 | + | 5 | x | × | 1200 | + | 2650 | ( | 530 | + | 1200 | ) | = | 2650 | x | + | 4584500 | + | 2 5 | ( | x | + | 530 | + | 1200 | ) | ( | 530 | + | 1200 | ) |
| 5 | x | × | 530 | + | 5 | x | × | 1200 | + | 2650 | ( | 530 | + | 1200 | ) | = | 2650 | x | + | 4584500 | + | 2 5 | x | ( | 530 | + | 1200 | ) | + | 2 5 | × | 530 | ( | 530 | + | 1200 | ) | + | 2 5 | × | 1200 | ( | 530 | + | 1200 | ) |
| 2650 | x | + | 6000 | x | + | 2650 | ( | 530 | + | 1200 | ) | = | 2650 | x | + | 4584500 | + | 2 5 | x | ( | 530 | + | 1200 | ) | + | 212 | ( | 530 | + | 1200 | ) | + | 480 | ( | 530 | + | 1200 | ) |
| 8650 | x | + | 2650 | ( | 530 | + | 1200 | ) | = | 2650 | x | + | 4584500 | + | 2 5 | x | ( | 530 | + | 1200 | ) | + | 212 | ( | 530 | + | 1200 | ) | + | 480 | ( | 530 | + | 1200 | ) |
| 8650 | x | + | 2650 | × | 530 | + | 2650 | × | 1200 | = | 2650 | x | + | 4584500 | + | 2 5 | x | ( | 530 | + | 1200 | ) | + | 212 | ( | 530 | + | 1200 | ) | + | 480 | ( | 530 | + | 1200 | ) |
| 8650 | x | + | 2650 | × | 530 | + | 2650 | × | 1200 | = | 2650 | x | + | 4584500 | + | 2 5 | x | × | 530 | + | 2 5 | x | × | 1200 | + | 212 | ( | 530 | + | 1200 | ) | + | 480 |
| 8650 | x | + | 1404500 | + | 3180000 | = | 2650 | x | + | 4584500 | + | 212 | x | + | 480 | x | + | 212 | ( | 530 | + | 1200 | ) | + | 480 | ( | 530 | + | 1200 | ) |
| 8650 | x | + | 4584500 | = | 3342 | x | + | 4584500 | + | 212 | ( | 530 | + | 1200 | ) | + | 480 | ( | 530 | + | 1200 | ) |
| 8650 | x | + | 4584500 | = | 3342 | x | + | 4584500 | + | 212 | × | 530 | + | 212 | × | 1200 | + | 480 | ( | 530 | + | 1200 | ) |
| 8650 | x | + | 4584500 | = | 3342 | x | + | 4584500 | + | 112360 | + | 254400 | + | 480 | ( | 530 | + | 1200 | ) |
| 8650 | x | + | 4584500 | = | 3342 | x | + | 4951260 | + | 480 | ( | 530 | + | 1200 | ) |
| 8650 | x | + | 4584500 | = | 3342 | x | + | 4951260 | + | 480 | × | 530 | + | 480 | × | 1200 |
| 8650 | x | + | 4584500 | = | 3342 | x | + | 4951260 | + | 254400 | + | 576000 |
| 8650 | x | + | 4584500 | = | 3342 | x | + | 5781660 |
| 8650 | x | − | 3342 | x | = | 5781660 | − | 4584500 |
| 5308 | x | = | 5781660 | − | 4584500 |
| 5308 | x | = | 1197160 |
| x | = | 1197160 | ÷ | 5308 |
| = | 1197160 | × | 1 5308 |
| = | 299290 | × | 1 1327 |
| x | = | 299290 1327 |
| x | = | 225.538809 |