| 1 | ÷ | 3 | × | ( | 230 | + | x | ) | = | 130 | − | x |
| Left side of the equation = | 1 3 | ( | 230 | + | x | ) |
1 3 | ( | 230 | + | x | ) | = | 130 | − | x |
| Left side of the equation = | 1 3 | × | 230 | + | 1 3 | x |
| = | 230 3 | + | 1 3 | x |
230 3 | + | 1 3 | x | = | 130 | − | x |
1 3 | x | + | x | = | 130 | − | 230 3 |
4 3 | x | = | 130 | − | 230 3 |
4 3 | x | = | 160 3 |
| x | = | 160 3 | ÷ | 4 3 |
| = | 160 3 | × | 3 4 |
| = | 40 | × | 1 |
| x | = | 40 |