| ( | X | + | 1 2 | ) | × | 6 5 | × | 1 100 | = | 63 100 |
| Left side of the equation = | ( | X | + | 1 2 | ) | × | 3 250 |
| ( | X | + | 1 2 | ) | × | 3 250 | = | 63 100 |
| Left side of the equation = | X | × | 3 250 | + | 1 2 | × | 3 250 |
| = | X | × | 3 250 | + | 3 500 |
3 250 | X | + | 3 500 | = | 63 100 |
3 250 | X | = | 63 100 | − | 3 500 |
3 250 | X | = | 78 125 |
| X | = | 78 125 | ÷ | 3 250 |
| = | 78 125 | × | 250 3 |
| = | 26 | × | 2 |
| X | = | 52 |