| 12 | × | 47 50 | = | ( | 3 5 | ( | 1 | + | X | ) | ) | ÷ | ( | 11 100 | − | X | ) | + | X |
| 方程两边同时乘以: | ( | 11 100 | − | X | ) |
| 12 | × | 47 50 | ( | 11 100 | − | X | ) | = | ( | 3 5 | ( | 1 | + | X | ) | ) | + | X | ( | 11 100 | − | X | ) |
| 12 | × | 47 50 | × | 11 100 | − | 12 | × | 47 50 | X | = | ( | 3 5 | ( | 1 | + | X | ) | ) | + | X | ( | 11 100 | − | X | ) |
| 12 | × | 47 50 | × | 11 100 | − | 12 | × | 47 50 | X | = | 3 5 | ( | 1 | + | X | ) | + | X | ( | 11 100 | − | X | ) |
1551 1250 | − | 282 25 | X | = | 3 5 | ( | 1 | + | X | ) | + | X | ( | 11 100 | − | X | ) |
1551 1250 | − | 282 25 | X | = | 3 5 | × | 1 | + | 3 5 | X | + | X | ( | 11 100 | − | X | ) |
1551 1250 | − | 282 25 | X | = | 3 5 | + | 3 5 | X | + | X | ( | 11 100 | − | X | ) |
1551 1250 | − | 282 25 | X | = | 3 5 | + | 3 5 | X | + | X | × | 11 100 | − | X | X |
1551 1250 | − | 282 25 | X | = | 3 5 | + | 71 100 | X | − | X | X |