| ( | ( | 2 5 | Y | − | 2500 | − | 7500 | × | 1 20 | − | 4000 | × | 3 50 | ) | × | 3 4 | − | 3000 | × | 2 25 | ) | ÷ | 500 | = | ( | ( | 2 5 | Y | − | 2500 | − | 7500 | × | 1 20 | ) | × | 3 4 | − | 3000 | × | 2 25 | ) | ÷ | ( | 500 | + | 4000 | ÷ | 16 | ) |
| 方程两边同时乘以: | ( | 500 | + | 4000 | ÷ | 16 | ) |
| ( | ( | 2 5 | Y | − | 2500 | − | 7500 | × | 1 20 | − | 4000 | × | 3 50 | ) | × | 3 4 | − | 3000 | × | 2 25 | ) | ÷ | 500 | × | ( | 500 | + | 4000 | ÷ | 16 | ) | = | ( | ( | 2 5 | Y | − | 2500 | − | 7500 | × | 1 20 | ) | × | 3 4 | − | 3000 | × | 2 25 | ) |
| ( | 2 5 | Y | − | 2500 | − | 7500 | × | 1 20 | − | 4000 | × | 3 50 | ) | × | 3 4 | ÷ | 500 | × | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 3000 | × | 2 25 | ÷ | 500 | × | ( | 500 | + | 4000 | ÷ | 16 | ) | = | ( | ( | 2 5 | Y | − | 2500 | − | 7500 | × | 1 20 | ) | × | 3 4 | − | 3000 | × | 2 25 | ) |
| ( | 2 5 | Y | − | 2500 | − | 7500 | × | 1 20 | − | 4000 | × | 3 50 | ) | × | 3 4 | ÷ | 500 | × | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 3000 | × | 2 25 | ÷ | 500 | × | ( | 500 | + | 4000 | ÷ | 16 | ) | = | ( | 2 5 | Y | − | 2500 | − | 7500 | × | 1 20 | ) | × | 3 4 | − | 3000 | × | 2 25 |
| ( | 2 5 | Y | − | 2500 | − | 7500 | × | 1 20 | − | 4000 | × | 3 50 | ) | × | 3 2000 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | ( | 2 5 | Y | − | 2500 | − | 7500 | × | 1 20 | ) | × | 3 4 | − | 240 |
2 5 | Y | × | 3 2000 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 2500 | × | 3 2000 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 7500 | × | 1 20 | × | 3 2000 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 4000 | = | ( | 2 5 | Y | − | 2500 | − | 7500 | × | 1 20 | ) | × | 3 4 | − | 240 |
2 5 | Y | × | 3 2000 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 2500 | × | 3 2000 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 7500 | × | 1 20 | × | 3 2000 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 4000 | = | 2 5 | Y | × | 3 4 | − | 2500 | × | 3 4 | − | 7500 | × | 1 20 | × | 3 4 | − | 240 |
3 5000 | Y | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 15 4 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 16 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 1875 | − | 1125 4 | − | 240 |
3 5000 | Y | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 15 4 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 16 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 9585 4 |
3 5000 | Y | × | 500 | + | 3 5000 | Y | × | 4000 | ÷ | 16 | − | 15 4 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 16 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 25 | = | 3 10 | Y | − | 9585 4 |
3 10 | Y | + | 3 20 | Y | − | 15 4 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 16 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 15 4 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 16 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 15 4 | × | 500 | − | 15 4 | × | 4000 | ÷ | 16 | − | 9 16 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 12 25 | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 1875 | − | 1875 2 | − | 9 16 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 5625 2 | − | 9 16 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 9 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 5625 2 | − | 9 16 | × | 500 | − | 9 16 | × | 4000 | ÷ | 16 | − | 9 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 5625 2 | − | 1125 4 | − | 1125 8 | − | 9 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 25875 8 | − | 9 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 25875 8 | − | 9 25 | × | 500 | − | 9 25 | × | 4000 | ÷ | 16 | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 25875 8 | − | 180 | − | 90 | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 28035 8 | − | 12 25 | ( | 500 | + | 4000 | ÷ | 16 | ) | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 28035 8 | − | 12 25 | × | 500 | − | 12 25 | × | 4000 | ÷ | 16 | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 28035 8 | − | 240 | − | 120 | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 30915 8 | = | 3 10 | Y | − | 9585 4 |
9 20 | Y | − | 3 10 | Y | = | - | 9585 4 | + | 30915 8 |
3 20 | Y | = | - | 9585 4 | + | 30915 8 |
3 20 | Y | = | 11745 8 |
| Y | = | 11745 8 | ÷ | 3 20 |
| = | 11745 8 | × | 20 3 |
| = | 3915 2 | × | 5 |
| Y | = | 19575 2 |
| Y | = | 9787.5 |