| X | ÷ | 135 | − | 200 | ÷ | 130 | − | 270 | ÷ | 1000 | = | 833333 1000000000 | ( | 720 | + | X | ) |
| 方程左边 = | X | × | 1 135 | − | 20 13 | − | 27 100 |
| = | 1 135 | X | − | 2351 1300 |
1 135 | X | − | 2351 1300 | = | 833333 1000000000 | ( | 720 | + | X | ) |
| 方程右边 = | 833333 1000000000 | × | 720 | + | 833333 1000000000 | X |
| = | 7499997 12500000 | + | 833333 1000000000 | X |
1 135 | X | − | 2351 1300 | = | 7499997 12500000 | + | 833333 1000000000 | X |
1 135 | X | − | 833333 1000000000 | X | = | 7499997 12500000 | + | 2351 1300 |