7 10 | ( | 28392 5 | + | 248582 25 | + | 35595 | x | + | 15093 50 | + | 14157 50 | x | + | 347055 | ) | = | 381600 | + | 4083674 5 | + | 10800 | x | + | 792360 | + | 223989 | + | 310353 2 |
| 方程左边 = | 7 10 | × | 28392 5 | + | 7 10 | × | 248582 25 | + | 7 10 | × | 35595 | x | + | 7 10 | × | 15093 50 | + | 7 10 | × | 14157 50 | x |
| = | 99372 25 | + | 870037 125 | + | 49833 2 | x | + | 105651 500 | + | 99099 500 | x | + | 485877 2 |
| = | 127042489 500 | + | 12557349 500 | x |
127042489 500 | + | 12557349 500 | x | = | 381600 | + | 4083674 5 | + | 10800 | x | + | 792360 | + | 223989 | + | 310353 2 |
| 方程右边 = | 23698603 10 | + | 10800 | x |
127042489 500 | + | 12557349 500 | x | = | 23698603 10 | + | 10800 | x |
12557349 500 | x | − | 10800 | x | = | 23698603 10 | − | 127042489 500 |
7157349 500 | x | = | 23698603 10 | − | 127042489 500 |