( | 19 20 | P | − | 11 | ) | × | 50000 | − | 67500 | = | 103550 |
方程左边 = | 19 20 | P | × | 50000 | − | 11 | × | 50000 | − | 67500 |
= | 47500 | P | − | 550000 | − | 67500 |
= | 47500 | P | − | 617500 |
47500 | P | − | 617500 | = | 103550 |
47500 | P | = | 103550 | + | 617500 |
47500 | P | = | 721050 |
P | = | 721050 | ÷ | 47500 |
= | 721050 | × | 1 47500 |
= | 759 | × | 1 50 |
P | = | 759 50 |
P | = | 15.18 |