( | 250 | ( | 1 | − | 5 100 | ) | − | ( | 225 2 | − | 25 2 | ) | ) | Q | − | 15000 | = | 720000 |
方程左边 = | 250 | ( | 1 | − | 5 100 | ) | Q | − | ( | 225 2 | − | 25 2 | ) | Q | − | 15000 |
= | 250 | × | 1 | Q | − | 250 | × | 5 100 | Q | − | ( | 225 2 | − | 25 2 | ) | Q | − | 15000 |
= | 250 | Q | − | 25 2 | Q | − | ( | 225 2 | − | 25 2 | ) | Q | − | 15000 |
= | 475 2 | Q | − | ( | 225 2 | − | 25 2 | ) | Q | − | 15000 |
= | 475 2 | Q | − | 225 2 | Q | + | 25 2 | Q | − | 15000 |
= | 275 2 | Q | − | 15000 |
275 2 | Q | − | 15000 | = | 720000 |
275 2 | Q | = | 720000 | + | 15000 |
275 2 | Q | = | 735000 |
Q | = | 735000 | ÷ | 275 2 |
= | 735000 | × | 2 275 |
= | 29400 | × | 2 11 |
Q | = | 58800 11 |
Q | = | 5345.454545 |