| 10 | ( | 2 | x | + | 300 | ) | ÷ | 3 | + | 8 | x | = | 3200 |
| Left side of the equation = | 10 3 | ( | 2 | x | + | 300 | ) | + | 8 | x |
10 3 | ( | 2 | x | + | 300 | ) | + | 8 | x | = | 3200 |
| Left side of the equation = | 10 3 | × | 2 | x | + | 10 3 | × | 300 | + | 8 | x |
| = | 20 3 | x | + | 1000 | + | 8 | x |
| = | 44 3 | x | + | 1000 |
44 3 | x | + | 1000 | = | 3200 |
44 3 | x | = | 3200 | − | 1000 |
44 3 | x | = | 2200 |
| x | = | 2200 | ÷ | 44 3 |
| = | 2200 | × | 3 44 |
| = | 50 | × | 3 |
| x | = | 150 |