| ( | 8600 | + | X | ) | ÷ | 12 | = | ( | 3800 | + | X | ) | ÷ | 8 |
| Left side of the equation = | 8600 | × | 1 12 | + | X | × | 1 12 |
| = | 2150 3 | + | X | × | 1 12 |
2150 3 | + | 1 12 | X | = | ( | 3800 | + | X | ) | ÷ | 8 |
| Right side of the equation = | 3800 | × | 1 8 | + | X | × | 1 8 |
| = | 475 | + | X | × | 1 8 |
2150 3 | + | 1 12 | X | = | 475 | + | 1 8 | X |
1 12 | X | − | 1 8 | X | = | 475 | − | 2150 3 |
| - | 1 24 | X | = | 475 | − | 2150 3 |
| - | 1 24 | X | = | - | 725 3 |
725 3 | = | 1 24 | X |
1 24 | X | = | 725 3 |
| X | = | 725 3 | ÷ | 1 24 |
| = | 725 3 | × | 24 |
| = | 725 | × | 8 |
| X | = | 5800 |