| ( | X | + | 801 100 | + | 403 50 | + | 401 50 | ) | ÷ | 4 | = | X |
| Left side of the equation = | X | × | 1 4 | + | 801 100 | × | 1 4 | + | 403 50 | × | 1 4 | + | 401 50 | × | 1 4 |
| = | X | × | 1 4 | + | 801 400 | + | 403 200 | + | 401 200 |
| = | 1 4 | X | + | 2409 400 |
1 4 | X | + | 2409 400 | = | X |
1 4 | X | − | X | = | - | 2409 400 |
| - | 3 4 | X | = | - | 2409 400 |
2409 400 | = | 3 4 | X |
3 4 | X | = | 2409 400 |
| X | = | 2409 400 | ÷ | 3 4 |
| = | 2409 400 | × | 4 3 |
| = | 803 100 | × | 1 |
| X | = | 803 100 |
| X | = | 8.03 |