| 410 | + | ( | 410 | − | 100 | ) | ( | 195 | a | ) | = | 7553 10 |
| 方程左边 = | 410 | + | 410 | ( | 195 | a | ) | − | 100 | ( | 195 | a | ) |
| = | 410 | + | 410 | × | 195 | a | − | 100 | ( | 195 | a | ) |
| = | 410 | + | 79950 | a | − | 100 | ( | 195 | a | ) |
| = | 410 | + | 79950 | a | − | 100 | × | 195 | a |
| = | 410 | + | 79950 | a | − | 19500 | a |
| = | 410 | + | 60450 | a |
| 410 | + | 60450 | a | = | 7553 10 |
| 60450 | a | = | 7553 10 | − | 410 |
| 60450 | a | = | 3453 10 |
| a | = | 3453 10 | ÷ | 60450 |
| = | 3453 10 | × | 1 60450 |
| = | 1151 10 | × | 1 20150 |
| a | = | 1151 201500 |
| a | = | 0.005712 |