| 150 | ( | x | ÷ | 500 | ) | = | 2500 | + | 50 | ( | x | ÷ | 400 | ) |
| Left side of the equation = | 150 | x | ÷ | 500 |
| = | 3 10 | x |
3 10 | x | = | 2500 | + | 50 | ( | x | ÷ | 400 | ) |
| Right side of the equation = | 2500 | + | 50 | x | ÷ | 400 |
| = | 2500 | + | 1 8 | x |
3 10 | x | = | 2500 | + | 1 8 | x |
3 10 | x | − | 1 8 | x | = | 2500 |
7 40 | x | = | 2500 |
| x | = | 2500 | ÷ | 7 40 |
| = | 2500 | × | 40 7 |
| x | = | 100000 7 |
| x | = | 14285.714286 |