| ( | ( | X | × | 12 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | ) | × | 10 100 | − | 2520 | ) | − | ( | ( | X | × | 12 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | ) | × | 20 100 | − | 1410 | ) | = | - | 4000 |
| Left side of the equation = | ( | X | × | 12 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | ) | × | 10 100 | − | 2520 | − | ( | ( | X | × | 12 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | ) | × | 20 100 | − | 1410 | ) |
| = | X | × | 12 | × | 10 100 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | × | 10 100 | − | 2520 | − | ( | ( | X | × | 12 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | ) | × | 20 100 | − | 1410 | ) |
| = | X | × | 6 5 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 6 5 | − | 2520 | − | ( | ( | X | × | 12 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | ) | × | 20 100 | − | 1410 | ) |
| = | 6 5 | X | − | 5000 | × | 6 5 | − | 1500 | × | 6 5 | − | 2000 | × | 6 5 | − | 2520 | − | ( | ( | X | × | 12 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | ) | × | 20 100 | − | 1410 | ) |
| = | 6 5 | X | − | 6000 | − | 1800 | − | 2400 | − | 2520 | − | ( | ( | X | × | 12 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | ) | × | 20 100 | − | 1410 | ) |
| = | 6 5 | X | − | 12720 | − | ( | ( | X | × | 12 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | ) | × | 20 100 | − | 1410 | ) |
| = | 6 5 | X | − | 12720 | − | ( | X | × | 12 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | ) | × | 20 100 | + | 1410 |
| = | 6 5 | X | − | 11310 | − | ( | X | × | 12 | − | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | ) | × | 20 100 |
| = | 6 5 | X | − | 11310 | − | X | × | 12 | × | 20 100 | + | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 | × | 20 100 |
| = | 6 5 | X | − | 11310 | − | X | × | 12 5 | + | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 5 |
| = | - | 6 5 | X | − | 11310 | + | ( | 5000 | + | 1500 | + | 2000 | ) | × | 12 5 |
| = | - | 6 5 | X | − | 11310 | + | 5000 | × | 12 5 | + | 1500 | × | 12 5 | + | 2000 | × | 12 5 |
| = | - | 6 5 | X | − | 11310 | + | 12000 | + | 3600 | + | 4800 |
| = | - | 6 5 | X | + | 9090 |
| - | 6 5 | X | + | 9090 | = | - | 4000 |
| - | 6 5 | X | = | - | 4000 | − | 9090 |
| - | 6 5 | X | = | - | 13090 |
| 13090 | = | 6 5 | X |
6 5 | X | = | 13090 |
| X | = | 13090 | ÷ | 6 5 |
| = | 13090 | × | 5 6 |
| = | 6545 | × | 5 3 |
| X | = | 32725 3 |
| X | = | 10908.333333 |