| 51 | ÷ | ( | 1 | + | 4 | ( | 2 | x | + | 7 | ) | ) | + | 11 | = | 10 |
| 方程两边同时乘以: | ( | 1 | + | 4 | ( | 2 | x | + | 7 | ) | ) |
| 51 | + | 11 | ( | 1 | + | 4 | ( | 2 | x | + | 7 | ) | ) | = | 10 | ( | 1 | + | 4 | ( | 2 | x | + | 7 | ) | ) |
| 51 | + | 11 | × | 1 | + | 11 | × | 4 | ( | 2 | x | + | 7 | ) | = | 10 | ( | 1 | + | 4 | ( | 2 | x | + | 7 | ) | ) |
| 51 | + | 11 | × | 1 | + | 11 | × | 4 | ( | 2 | x | + | 7 | ) | = | 10 | × | 1 | + | 10 | × | 4 | ( | 2 | x | + | 7 | ) |
| 51 | + | 11 | + | 44 | ( | 2 | x | + | 7 | ) | = | 10 | + | 40 | ( | 2 | x | + | 7 | ) |
| 62 | + | 44 | ( | 2 | x | + | 7 | ) | = | 10 | + | 40 | ( | 2 | x | + | 7 | ) |
| 62 | + | 44 | × | 2 | x | + | 44 | × | 7 | = | 10 | + | 40 | ( | 2 | x | + | 7 | ) |
| 62 | + | 44 | × | 2 | x | + | 44 | × | 7 | = | 10 | + | 40 | × | 2 | x | + | 40 | × | 7 |
| 62 | + | 88 | x | + | 308 | = | 10 | + | 80 | x | + | 280 |
| 370 | + | 88 | x | = | 290 | + | 80 | x |
| 88 | x | − | 80 | x | = | 290 | − | 370 |
| 8 | x | = | 290 | − | 370 |
| 8 | x | = | - | 80 |
| x | = | - | 80 | ÷ | 8 |
| = | - | 80 | × | 1 8 |
| = | - | 10 | × | 1 |
| x | = | - | 10 |