| ( | 121 10 | + | 2 | x | ) | ( | 303 10 | + | 2 | x | ) | = | 8163 10 | + | 11499 50 |
| 方程左边 = | 121 10 | ( | 303 10 | + | 2 | x | ) | + | 2 | x | ( | 303 10 | + | 2 | x | ) |
| = | 121 10 | × | 303 10 | + | 121 10 | × | 2 | x | + | 2 | x | ( | 303 10 | + | 2 | x | ) |
| = | 36663 100 | + | 121 5 | x | + | 2 | x | ( | 303 10 | + | 2 | x | ) |
| = | 36663 100 | + | 121 5 | x | + | 2 | x | × | 303 10 | + | 2 | x | × | 2 | x |
| = | 36663 100 | + | 121 5 | x | + | 303 5 | x | + | 4 | x | x |
| = | 36663 100 | + | 424 5 | x | + | 4 | x | x |
36663 100 | + | 424 5 | x | + | 4 | x | x | = | 8163 10 | + | 11499 50 |
| 方程右边 = | 26157 25 |
36663 100 | + | 424 5 | x | + | 4 | x | x | = | 26157 25 |