1 5 | × | 49 5 | ( | x | + | 3 10 | ) | + | 3 20 | × | 49 5 | x | = | 147 10 | x | x |
| 方程左边 = | 49 25 | ( | x | + | 3 10 | ) | + | 147 100 | x |
49 25 | ( | x | + | 3 10 | ) | + | 147 100 | x | = | 147 10 | x | x |
| 方程左边 = | 49 25 | x | + | 49 25 | × | 3 10 | + | 147 100 | x |
| = | 49 25 | x | + | 147 250 | + | 147 100 | x |
| = | 343 100 | x | + | 147 250 |
343 100 | x | + | 147 250 | = | 147 10 | x | x |