| 5 | ÷ | 3 | × | ( | 3 | ÷ | 5 | × | ( | 3 | x | + | 15 | ) | − | 10 | ) | + | x | = | 4 |
| Left side of the equation = | 5 3 | ( | 3 | ÷ | 5 | × | ( | 3 | x | + | 15 | ) | − | 10 | ) | + | x |
5 3 | ( | 3 | ÷ | 5 | × | ( | 3 | x | + | 15 | ) | − | 10 | ) | + | x | = | 4 |
| Left side of the equation = | 5 3 | × | 3 | ÷ | 5 | × | ( | 3 | x | + | 15 | ) | − | 5 3 | × | 10 | + | x |
| = | 1 | ( | 3 | x | + | 15 | ) | − | 50 3 | + | x |
| = | 1 | × | 3 | x | + | 1 | × | 15 | − | 50 3 | + | x |
| = | 3 | x | + | 15 | − | 50 3 | + | x |
| = | 4 | x | − | 5 3 |
| 4 | x | − | 5 3 | = | 4 |
| 4 | x | = | 4 | + | 5 3 |
| 4 | x | = | 17 3 |
| x | = | 17 3 | ÷ | 4 |
| = | 17 3 | × | 1 4 |
| x | = | 17 12 |
| x | = | 1.416667 |