1 20 | x | + | 4 5 | × | 1 25 | ( | 500 | − | x | ) | = | 183 10 |
| 方程左边 = | 1 20 | x | + | 4 125 | ( | 500 | − | x | ) |
1 20 | x | + | 4 125 | ( | 500 | − | x | ) | = | 183 10 |
| 方程左边 = | 1 20 | x | + | 4 125 | × | 500 | − | 4 125 | x |
| = | 1 20 | x | + | 16 | − | 4 125 | x |
| = | 9 500 | x | + | 16 |
9 500 | x | + | 16 | = | 183 10 |
9 500 | x | = | 183 10 | − | 16 |
9 500 | x | = | 23 10 |
| x | = | 23 10 | ÷ | 9 500 |
| = | 23 10 | × | 500 9 |
| = | 23 | × | 50 9 |
| x | = | 1150 9 |
| x | = | 127.777778 |