| ( | 19 4 | ( | 529 | + | X | ) | + | 107 | ÷ | ( | 636 | + | X | ) | ) | = | 0 |
19 4 | ( | 529 | + | X | ) | + | 107 | ÷ | ( | 636 | + | X | ) | = | 0 |
| 方程两边同时乘以: | ( | 636 | + | X | ) |
19 4 | ( | 529 | + | X | ) | ( | 636 | + | X | ) | + | 107 | = | 0 |
19 4 | × | 529 | ( | 636 | + | X | ) | + | 19 4 | X | ( | 636 | + | X | ) | + | 107 | = | 0 |
10051 4 | ( | 636 | + | X | ) | + | 19 4 | X | ( | 636 | + | X | ) | + | 107 | = | 0 |
10051 4 | × | 636 | + | 10051 4 | X | + | 19 4 | X | ( | 636 | + | X | ) | + | 107 | = | 0 |
| 1598109 | + | 10051 4 | X | + | 19 4 | X | ( | 636 | + | X | ) | + | 107 | = | 0 |
| 1598216 | + | 10051 4 | X | + | 19 4 | X | ( | 636 | + | X | ) | = | 0 |
| 1598216 | + | 10051 4 | X | + | 19 4 | X | × | 636 | + | 19 4 | X | X | = | 0 |
| 1598216 | + | 10051 4 | X | + | 3021 | X | + | 19 4 | X | X | = | 0 |
| 1598216 | + | 22135 4 | X | + | 19 4 | X | X | = | 0 |