13 2 | + | ( | x | × | 3 10 | ) | + | ( | x | × | 1 4 | ) | = | x |
| 方程左边 = | 13 2 | + | x | × | 3 10 | + | ( | x | × | 1 4 | ) |
| = | 13 2 | + | 3 10 | x | + | x | × | 1 4 |
| = | 13 2 | + | 11 20 | x |
13 2 | + | 11 20 | x | = | x |
11 20 | x | − | x | = | - | 13 2 |
| - | 9 20 | x | = | - | 13 2 |
13 2 | = | 9 20 | x |
9 20 | x | = | 13 2 |
| x | = | 13 2 | ÷ | 9 20 |
| = | 13 2 | × | 20 9 |
| = | 13 | × | 10 9 |
| x | = | 130 9 |
| x | = | 14.444444 |