13 20 | ( | 88 | + | X | ) | = | 48 | + | 19 |
| Left side of the equation = | 13 20 | × | 88 | + | 13 20 | X |
| = | 286 5 | + | 13 20 | X |
286 5 | + | 13 20 | X | = | 48 | + | 19 |
| Right side of the equation = | 67 |
286 5 | + | 13 20 | X | = | 67 |
13 20 | X | = | 67 | − | 286 5 |
13 20 | X | = | 49 5 |
| X | = | 49 5 | ÷ | 13 20 |
| = | 49 5 | × | 20 13 |
| = | 49 | × | 4 13 |
| X | = | 196 13 |
| X | = | 15.076923 |