| X | − | 3 10 | X | + | 700 | = | X | + | 1 | ÷ | 6 | × | X |
| Left side of the equation = | 7 10 | X | + | 700 |
7 10 | X | + | 700 | = | X | + | 1 | ÷ | 6 | × | X |
| Right side of the equation = | X | + | 1 6 | X |
| = | 7 6 | X |
7 10 | X | + | 700 | = | 7 6 | X |
7 10 | X | − | 7 6 | X | = | - | 700 |
| - | 7 15 | X | = | - | 700 |
| 700 | = | 7 15 | X |
7 15 | X | = | 700 |
| X | = | 700 | ÷ | 7 15 |
| = | 700 | × | 15 7 |
| = | 100 | × | 15 |
| X | = | 1500 |