| y | = | 100 | − | 1997500 | ÷ | ( | 3549 | + | 19975 | ) |
| 方程两边同时乘以: | ( | 3549 | + | 19975 | ) |
| y | ( | 3549 | + | 19975 | ) | = | 100 | ( | 3549 | + | 19975 | ) | − | 1997500 |
| y | × | 3549 | + | y | × | 19975 | = | 100 | ( | 3549 | + | 19975 | ) | − | 1997500 |
| y | × | 3549 | + | y | × | 19975 | = | 100 | × | 3549 | + | 100 | × | 19975 | − | 1997500 |
| y | × | 3549 | + | y | × | 19975 | = | 354900 | + | 1997500 | − | 1997500 |
| 23524 | y | = | 354900 |
| y | = | 354900 | ÷ | 23524 |
| = | 354900 | × | 1 23524 |
| = | 88725 | × | 1 5881 |
| y | = | 88725 5881 |
| y | = | 15.08672 |