| x | + | 113 | ÷ | x | = | ( | x | ) | + | 113 | ÷ | ( | x | ) |
| 方程两边同时乘以: | x | , | ( | 1 | ) |
| x | x | ( | 1 | ) | + | 113 | ( | 1 | ) | = | ( | x | ) | x | ( | 1 | ) | + | 113 | × | 1 |
| x | x | × | 1 | + | 113 | ( | 1 | ) | = | ( | x | ) | x | ( | 1 | ) | + | 113 | × | 1 |
| x | x | × | 1 | + | 113 | ( | 1 | ) | = | x | x | ( | 1 | ) | + | 113 | × | 1 |
| x | x | × | 1 | + | 113 | ( | 1 | ) | = | x | x | ( | 1 | ) | + | 113 |
| x | x | × | 1 | + | 113 | × | 1 | = | x | x | ( | 1 | ) | + | 113 |
| x | x | × | 1 | + | 113 | × | 1 | = | x | x | × | 1 | + | 113 |
| x | x | × | 1 | + | 113 | = | x | x | × | 1 | + | 113 |