| 3029 | x | + | 99912809 | − | 1289090 | x | = | x | ÷ | 3 |
| 方程左边 = | - | 1286061 | x | + | 99912809 |
| - | 1286061 | x | + | 99912809 | = | x | ÷ | 3 |
| - | 1286061 | x | − | 1 3 | x | = | - | 99912809 |
| - | 3858184 3 | x | = | - | 99912809 |
| 99912809 | = | 3858184 3 | x |
3858184 3 | x | = | 99912809 |
| x | = | 99912809 | ÷ | 3858184 3 |
| = | 99912809 | × | 3 3858184 |
| x | = | 299738427 3858184 |
| x | = | 77.688992 |