| x | ÷ | 30 | = | ( | ( | x | − | 1 | ) | ÷ | 45 | ) | + | 15 |
| Right side of the equation = | ( | x | − | 1 | ) | ÷ | 45 | + | 15 |
| = | x | × | 1 45 | − | 1 | × | 1 45 | + | 15 |
| = | x | × | 1 45 | − | 1 45 | + | 15 |
| = | 1 45 | x | + | 674 45 |
1 30 | x | = | 1 45 | x | + | 674 45 |
1 30 | x | − | 1 45 | x | = | 674 45 |
1 90 | x | = | 674 45 |
| x | = | 674 45 | ÷ | 1 90 |
| = | 674 45 | × | 90 |
| = | 674 | × | 2 |
| x | = | 1348 |