| ( | 550 | × | 193 100 | + | y | × | 3 2 | ) | ÷ | ( | 550 | + | y | ) | = | 157 100 |
| 方程两边同时乘以: | ( | 550 | + | y | ) |
| ( | 550 | × | 193 100 | + | y | × | 3 2 | ) | = | 157 100 | ( | 550 | + | y | ) |
| 550 | × | 193 100 | + | y | × | 3 2 | = | 157 100 | ( | 550 | + | y | ) |
| 550 | × | 193 100 | + | y | × | 3 2 | = | 157 100 | × | 550 | + | 157 100 | y |
2123 2 | + | y | × | 3 2 | = | 1727 2 | + | 157 100 | y |
3 2 | y | − | 157 100 | y | = | 1727 2 | − | 2123 2 |
| - | 7 100 | y | = | 1727 2 | − | 2123 2 |
| - | 7 100 | y | = | - | 198 |
| 198 | = | 7 100 | y |
7 100 | y | = | 198 |
| y | = | 198 | ÷ | 7 100 |
| = | 198 | × | 100 7 |
| y | = | 19800 7 |
| y | = | 2828.571429 |