| ( | 31 50 | x | + | 91 250 | ) | ( | 1 | + | 3 2 | x | ) | = | 5 2 | x |
| 方程左边 = | 31 50 | x | ( | 1 | + | 3 2 | x | ) | + | 91 250 | ( | 1 | + | 3 2 | x | ) |
| = | 31 50 | x | × | 1 | + | 31 50 | x | × | 3 2 | x | + | 91 250 | ( | 1 | + | 3 2 | x | ) |
| = | 31 50 | x | + | 93 100 | x | x | + | 91 250 | ( | 1 | + | 3 2 | x | ) |
| = | 31 50 | x | + | 93 100 | x | x | + | 91 250 | × | 1 | + | 91 250 | × | 3 2 | x |
| = | 31 50 | x | + | 93 100 | x | x | + | 91 250 | + | 273 500 | x |
| = | 583 500 | x | + | 93 100 | x | x | + | 91 250 |
583 500 | x | + | 93 100 | x | x | + | 91 250 | = | 5 2 | x |