13 5 | x | + | ( | 23 | − | 10 | − | x | ) | × | 7 2 | = | 409 5 | − | 13 5 | x |
| Left side of the equation = | 13 5 | x | + | 23 | × | 7 2 | − | 10 | × | 7 2 | − | x | × | 7 2 |
| = | 13 5 | x | + | 161 2 | − | 35 | − | x | × | 7 2 |
| = | - | 9 10 | x | + | 91 2 |
| - | 9 10 | x | + | 91 2 | = | 409 5 | − | 13 5 | x |
| - | 9 10 | x | + | 13 5 | x | = | 409 5 | − | 91 2 |
17 10 | x | = | 409 5 | − | 91 2 |
17 10 | x | = | 363 10 |
| x | = | 363 10 | ÷ | 17 10 |
| = | 363 10 | × | 10 17 |
| = | 363 | × | 1 17 |
| x | = | 363 17 |
| x | = | 21.352941 |