| x | + | x | × | 309 500 | + | ( | x | × | 309 500 | ) | × | 309 500 | = | 73 |
| 方程左边 = | 809 500 | x | + | ( | x | × | 309 500 | ) | × | 309 500 |
809 500 | x | + | ( | x | × | 309 500 | ) | × | 309 500 | = | 73 |
| 方程左边 = | 809 500 | x | + | x | × | 309 500 | × | 309 500 |
| = | 809 500 | x | + | x | × | 95481 250000 |
| = | 499981 250000 | x |
499981 250000 | x | = | 73 |
| x | = | 73 | ÷ | 499981 250000 |
| = | 73 | × | 250000 499981 |
| x | = | 18250000 499981 |
| x | = | 36.501387 |