73 1000 | + | 21 200 | x | + | 29 500 | ( | 1 2 | − | x | ) | = | 111 1000 |
| 方程左边 = | 73 1000 | + | 21 200 | x | + | 29 500 | × | 1 2 | − | 29 500 | x |
| = | 73 1000 | + | 21 200 | x | + | 29 1000 | − | 29 500 | x |
| = | 51 500 | + | 47 1000 | x |
51 500 | + | 47 1000 | x | = | 111 1000 |
47 1000 | x | = | 111 1000 | − | 51 500 |
47 1000 | x | = | 9 1000 |
| x | = | 9 1000 | ÷ | 47 1000 |
| = | 9 1000 | × | 1000 47 |
| = | 9 | × | 1 47 |
| x | = | 9 47 |
| x | = | 0.191489 |