| x | × | 2 | + | 53 50000 | x | + | 689 10000000 | = | 0 |
| 方程左边 = | 100053 50000 | x | + | 689 10000000 |
100053 50000 | x | + | 689 10000000 | = | 0 |
100053 50000 | x | = | 0 | − | 689 10000000 |
100053 50000 | x | = | - | 689 10000000 |
| x | = | - | 689 10000000 | ÷ | 100053 50000 |
| = | - | 689 10000000 | × | 50000 100053 |
| = | - | 689 200 | × | 1 100053 |
| x | = | - | 689 20010600 |
| x | = | - 0.000034 |