| ( | 1406640 | + | 1641080 | ) | ÷ | 2 | × | X | = | 1500000 | + | ( | 1641080 | + | 1875520 | ) | ÷ | 2 | × | X |
| Left side of the equation = | 1406640 | × | 1 2 | X | + | 1641080 | × | 1 2 | X |
| = | 703320 | X | + | 820540 | X |
| = | 1523860 | X |
| 1523860 | X | = | 1500000 | + | ( | 1641080 | + | 1875520 | ) | ÷ | 2 | × | X |
| Right side of the equation = | 1500000 | + | 1641080 | × | 1 2 | X | + | 1875520 | × | 1 2 | X |
| = | 1500000 | + | 820540 | X | + | 937760 | X |
| = | 1500000 | + | 1758300 | X |
| 1523860 | X | = | 1500000 | + | 1758300 | X |
| 1523860 | X | − | 1758300 | X | = | 1500000 |
| - | 234440 | X | = | 1500000 |
| - | 1500000 | = | 234440 | X |
| 234440 | X | = | - | 1500000 |
| X | = | - | 1500000 | ÷ | 234440 |
| = | - | 1500000 | × | 1 234440 |
| = | - | 37500 | × | 1 5861 |
| X | = | - | 37500 5861 |
| X | = | - 6.398226 |