| ( | x | − | 4 | ) | x | × | 5 | ÷ | 12 | − | 4 | = | 5 | ÷ | 13 | × | x |
| Left side of the equation = | ( | x | − | 4 | ) | x | × | 5 12 | − | 4 |
| ( | x | − | 4 | ) | x | × | 5 12 | − | 4 | = | 5 | ÷ | 13 | × | x |
| Left side of the equation = | x | x | × | 5 12 | − | 4 | x | × | 5 12 | − | 4 |
| = | x | x | × | 5 12 | − | 5 3 | x | − | 4 |
| x | x | × | 5 12 | − | 5 3 | x | − | 4 | = | 5 | ÷ | 13 | × | x |
| Right side of the equation = | 5 13 | x |
| x | x | × | 5 12 | − | 5 3 | x | − | 4 | = | 5 13 | x |