| ( | a | − | 113 10 | ) | ÷ | ( | 1 | + | a | ) | = | 73 10 |
| 方程两边同时乘以: | ( | 1 | + | a | ) |
| ( | a | − | 113 10 | ) | = | 73 10 | ( | 1 | + | a | ) |
| a | − | 113 10 | = | 73 10 | ( | 1 | + | a | ) |
| a | − | 113 10 | = | 73 10 | × | 1 | + | 73 10 | a |
| a | − | 113 10 | = | 73 10 | + | 73 10 | a |
| a | − | 73 10 | a | = | 73 10 | + | 113 10 |
| - | 63 10 | a | = | 73 10 | + | 113 10 |
| - | 63 10 | a | = | 93 5 |
| - | 93 5 | = | 63 10 | a |
63 10 | a | = | - | 93 5 |
| a | = | - | 93 5 | ÷ | 63 10 |
| = | - | 93 5 | × | 10 63 |
| = | - | 31 | × | 2 21 |
| a | = | - | 62 21 |
| a | = | - 2.952381 |