| 5 | ( | 16 | x | − | 216 | ) | = | 4 | ( | 4185 | − | 115 | x | ) |
| Left side of the equation = | 5 | × | 16 | x | − | 5 | × | 216 |
| = | 80 | x | − | 1080 |
| 80 | x | − | 1080 | = | 4 | ( | 4185 | − | 115 | x | ) |
| Right side of the equation = | 4 | × | 4185 | − | 4 | × | 115 | x |
| = | 16740 | − | 460 | x |
| 80 | x | − | 1080 | = | 16740 | − | 460 | x |
| 80 | x | + | 460 | x | = | 16740 | + | 1080 |
| 540 | x | = | 16740 | + | 1080 |
| 540 | x | = | 17820 |
| x | = | 17820 | ÷ | 540 |
| = | 17820 | × | 1 540 |
| = | 33 | × | 1 |
| x | = | 33 |