| 450 | Y | − | ( | 70 | + | 240 | Y | ) | − | 171 | − | 50 | − | 3451 50 | − | 10 | − | 447 100 | × | 1 20 | − | ( | 450 | Y | × | 13 100 | − | 15 | Y | − | 152 5 | ) | × | 3 25 | = | 0 |
| 方程左边 = | 450 | Y | − | ( | 70 | + | 240 | Y | ) | − | 171 | − | 50 | − | 3451 50 | − | 10 | − | 447 2000 | − | ( | 450 | Y | × | 13 100 | − | 15 | Y | − | 152 5 | ) | × | 3 25 |
| = | 450 | Y | − | ( | 70 | + | 240 | Y | ) | − | 600487 2000 | − | ( | 450 | Y | × | 13 100 | − | 15 | Y | − | 152 5 | ) | × | 3 25 |
| 450 | Y | − | ( | 70 | + | 240 | Y | ) | − | 600487 2000 | − | ( | 450 | Y | × | 13 100 | − | 15 | Y | − | 152 5 | ) | × | 3 25 | = | 0 |
| 方程左边 = | 450 | Y | − | 70 | − | 240 | Y | − | 600487 2000 | − | ( | 450 | Y | × | 13 100 | − | 15 | Y | − | 152 5 | ) | × | 3 25 |
| = | 210 | Y | − | 740487 2000 | − | ( | 450 | Y | × | 13 100 | − | 15 | Y | − | 152 5 | ) | × | 3 25 |
| = | 210 | Y | − | 740487 2000 | − | 450 | Y | × | 13 100 | × | 3 25 | + | 15 | Y | × | 3 25 | + | 152 5 | × | 3 25 |
| = | 210 | Y | − | 740487 2000 | − | 351 50 | Y | + | 9 5 | Y | + | 456 125 |
| = | 10239 50 | Y | − | 733191 2000 |
10239 50 | Y | − | 733191 2000 | = | 0 |
10239 50 | Y | = | 0 | + | 733191 2000 |
10239 50 | Y | = | 733191 2000 |
| Y | = | 733191 2000 | ÷ | 10239 50 |
| = | 733191 2000 | × | 50 10239 |
| = | 244397 40 | × | 1 3413 |
| Y | = | 244397 136520 |
| Y | = | 1.790192 |