| ( | 260 | + | ( | 19 | × | 4 | ) | ) | ÷ | ( | 4 | + | 2 | ) | = | x |
| 方程两边同时乘以: | ( | 4 | + | 2 | ) |
| ( | 260 | + | ( | 19 | × | 4 | ) | ) | = | x | ( | 4 | + | 2 | ) |
| 260 | + | ( | 19 | × | 4 | ) | = | x | ( | 4 | + | 2 | ) |
| 260 | + | ( | 19 | × | 4 | ) | = | x | × | 4 | + | x | × | 2 |
| 260 | + | ( | 19 | × | 4 | ) | = | 6 | x |
| 260 | + | 19 | × | 4 | = | 6 | x |
| 260 | + | 76 | = | 6 | x |
| 336 | = | 6 | x |
| - | 6 | x | = | - | 336 |
| 336 | = | 6 | x |
| 6 | x | = | 336 |
| x | = | 336 | ÷ | 6 |
| = | 336 | × | 1 6 |
| = | 56 | × | 1 |
| x | = | 56 |