| 10 | = | ( | ( | x | − | x | ÷ | 11 10 | × | x | × | 1 20 | ) | + | 4 | ) | ÷ | 7 |
| Right side of the equation = | ( | x | − | x | ÷ | 11 10 | × | x | × | 1 20 | ) | × | 1 7 | + | 4 | × | 1 7 |
| = | ( | x | − | x | ÷ | 11 10 | × | x | × | 1 20 | ) | × | 1 7 | + | 4 7 |
| = | x | × | 1 7 | − | x | ÷ | 11 10 | × | x | × | 1 20 | × | 1 7 | + | 4 7 |
| = | x | × | 1 7 | − | x | × | 1 154 | x | + | 4 7 |
| 10 | = | 1 7 | x | − | x | × | 1 154 | x | + | 4 7 |