| 450 | q | − | ( | ( | 70 | + | 240 | q | ) | + | 171 | + | 50 | + | 34509 500 | + | 10 | + | 179 800 | ) | − | ( | 450 | q | × | 13 100 | − | 15 | q | − | 152 5 | ) | × | 3 25 | = | 0 |
| 方程左边 = | 450 | q | − | ( | 70 | + | 240 | q | ) | − | 171 | − | 50 | − | 34509 500 | − | 10 | − | 179 800 | − | ( | 450 | q | × | 13 100 | − | 15 | q | − | 152 5 | ) | × | 3 25 |
| = | 450 | q | − | ( | 70 | + | 240 | q | ) | − | 1200967 4000 | − | ( | 450 | q | × | 13 100 | − | 15 | q | − | 152 5 | ) | × | 3 25 |
| = | 450 | q | − | 70 | − | 240 | q | − | 1200967 4000 | − | ( | 450 | q | × | 13 100 | − | 15 | q | − | 152 5 | ) | × | 3 25 |
| = | 210 | q | − | 1480967 4000 | − | ( | 450 | q | × | 13 100 | − | 15 | q | − | 152 5 | ) | × | 3 25 |
| = | 210 | q | − | 1480967 4000 | − | 450 | q | × | 13 100 | × | 3 25 | + | 15 | q | × | 3 25 | + | 152 5 | × | 3 25 |
| = | 210 | q | − | 1480967 4000 | − | 351 50 | q | + | 9 5 | q | + | 456 125 |
| = | 10239 50 | q | − | 11731 32 |
10239 50 | q | − | 11731 32 | = | 0 |
10239 50 | q | = | 0 | + | 11731 32 |
10239 50 | q | = | 11731 32 |
| q | = | 11731 32 | ÷ | 10239 50 |
| = | 11731 32 | × | 50 10239 |
| = | 11731 16 | × | 25 10239 |
| q | = | 293275 163824 |
| q | = | 1.790183 |