3 1000 | k | + | 47 250 | − | 1 1000 | k | = | 1 5 | k | − | 1 100 |
| 方程左边 = | 1 500 | k | + | 47 250 |
1 500 | k | + | 47 250 | = | 1 5 | k | − | 1 100 |
1 500 | k | − | 1 5 | k | = | - | 1 100 | − | 47 250 |
| - | 99 500 | k | = | - | 1 100 | − | 47 250 |
| - | 99 500 | k | = | - | 99 500 |
99 500 | = | 99 500 | k |
99 500 | k | = | 99 500 |
| k | = | 99 500 | ÷ | 99 500 |
| = | 99 500 | × | 500 99 |
| = | 1 | × | 1 |
| k | = | 1 |