| ( | 31600 | + | 1400 | − | 14400 | ) | + | 700 | x | = | 800 | x |
| Left side of the equation = | 31600 | + | 1400 | − | 14400 | + | 700 | x |
| = | 18600 | + | 700 | x |
| 18600 | + | 700 | x | = | 800 | x |
| 700 | x | − | 800 | x | = | - | 18600 |
| - | 100 | x | = | - | 18600 |
| 18600 | = | 100 | x |
| 100 | x | = | 18600 |
| x | = | 18600 | ÷ | 100 |
| = | 18600 | × | 1 100 |
| = | 186 | × | 1 |
| x | = | 186 |