| x | + | x | × | 309 500 | + | ( | x | × | 309 500 | ) | × | 309 500 | = | 68 |
| 方程左边 = | 809 500 | x | + | ( | x | × | 309 500 | ) | × | 309 500 |
809 500 | x | + | ( | x | × | 309 500 | ) | × | 309 500 | = | 68 |
| 方程左边 = | 809 500 | x | + | x | × | 309 500 | × | 309 500 |
| = | 809 500 | x | + | x | × | 95481 250000 |
| = | 499981 250000 | x |
499981 250000 | x | = | 68 |
| x | = | 68 | ÷ | 499981 250000 |
| = | 68 | × | 250000 499981 |
| x | = | 17000000 499981 |
| x | = | 34.001292 |