| 100000 | = | 200 | x | − | ( | 30000 | + | 140 | x | ) |
| Right side of the equation = | 200 | x | − | 30000 | − | 140 | x |
| = | 60 | x | − | 30000 |
| 100000 | = | 60 | x | − | 30000 |
| - | 60 | x | = | - | 30000 | − | 100000 |
| - | 60 | x | = | - | 130000 |
| 130000 | = | 60 | x |
| 60 | x | = | 130000 |
| x | = | 130000 | ÷ | 60 |
| = | 130000 | × | 1 60 |
| = | 6500 | × | 1 3 |
| x | = | 6500 3 |
| x | = | 2166.666667 |