| 12 | + | X | = | 93 100 | ( | 13 | + | X | ) |
| Right side of the equation = | 93 100 | × | 13 | + | 93 100 | X |
| = | 1209 100 | + | 93 100 | X |
| 12 | + | X | = | 1209 100 | + | 93 100 | X |
| X | − | 93 100 | X | = | 1209 100 | − | 12 |
7 100 | X | = | 1209 100 | − | 12 |
7 100 | X | = | 9 100 |
| X | = | 9 100 | ÷ | 7 100 |
| = | 9 100 | × | 100 7 |
| = | 9 | × | 1 7 |
| X | = | 9 7 |
| X | = | 1.285714 |