507 1000 | ÷ | ( | 400000 | + | 17 2 | Y | ) | = | 493 1000 | ÷ | ( | 500000 | + | 34 5 | Y | ) |
| 方程两边同时乘以: | ( | 400000 | + | 17 2 | Y | ) | , | ( | 500000 | + | 34 5 | Y | ) |
507 1000 | ( | 500000 | + | 34 5 | Y | ) | = | 493 1000 | ( | 400000 | + | 17 2 | Y | ) |
507 1000 | × | 500000 | + | 507 1000 | × | 34 5 | Y | = | 493 1000 | ( | 400000 | + | 17 2 | Y | ) |
507 1000 | × | 500000 | + | 507 1000 | × | 34 5 | Y | = | 493 1000 | × | 400000 | + | 493 1000 | × | 17 2 | Y |
| 253500 | + | 8619 2500 | Y | = | 197200 | + | 8381 2000 | Y |
8619 2500 | Y | − | 8381 2000 | Y | = | 197200 | − | 253500 |
| - | 7429 10000 | Y | = | 197200 | − | 253500 |
| - | 7429 10000 | Y | = | - | 56300 |
| 56300 | = | 7429 10000 | Y |
7429 10000 | Y | = | 56300 |
| Y | = | 56300 | ÷ | 7429 10000 |
| = | 56300 | × | 10000 7429 |
| Y | = | 563000000 7429 |
| Y | = | 75784.089379 |