| 3 | x | + | 4 | ( | 1 | − | x | ) | = | 63 50 | ( | 3 | x | + | 2 | ( | 1 | − | x | ) | ) |
| 方程左边 = | 3 | x | + | 4 | × | 1 | − | 4 | x |
| = | 3 | x | + | 4 | − | 4 | x |
| = | - | 1 | x | + | 4 |
| - | 1 | x | + | 4 | = | 63 50 | ( | 3 | x | + | 2 | ( | 1 | − | x | ) | ) |
| 方程右边 = | 63 50 | × | 3 | x | + | 63 50 | × | 2 | ( | 1 | − | x | ) |
| = | 189 50 | x | + | 63 25 | ( | 1 | − | x | ) |
| = | 189 50 | x | + | 63 25 | × | 1 | − | 63 25 | x |
| = | 189 50 | x | + | 63 25 | − | 63 25 | x |
| = | 63 50 | x | + | 63 25 |
| - | 1 | x | + | 4 | = | 63 50 | x | + | 63 25 |
| - | 1 | x | − | 63 50 | x | = | 63 25 | − | 4 |
| - | 113 50 | x | = | 63 25 | − | 4 |
| - | 113 50 | x | = | - | 37 25 |
37 25 | = | 113 50 | x |
113 50 | x | = | 37 25 |
| x | = | 37 25 | ÷ | 113 50 |
| = | 37 25 | × | 50 113 |
| = | 37 | × | 2 113 |
| x | = | 74 113 |
| x | = | 0.654867 |