| 39 | ( | 30 | x | + | 28 | ) | − | 29063 | = | 4 | x | + | 13 |
| Left side of the equation = | 39 | × | 30 | x | + | 39 | × | 28 | − | 29063 |
| = | 1170 | x | + | 1092 | − | 29063 |
| = | 1170 | x | − | 27971 |
| 1170 | x | − | 27971 | = | 4 | x | + | 13 |
| 1170 | x | − | 4 | x | = | 13 | + | 27971 |
| 1166 | x | = | 13 | + | 27971 |
| 1166 | x | = | 27984 |
| x | = | 27984 | ÷ | 1166 |
| = | 27984 | × | 1 1166 |
| = | 24 | × | 1 |
| x | = | 24 |