| 5 | ÷ | 102 | + | 8 | ÷ | 447 10 | + | X | ÷ | 255 2 | + | ( | 422 5 | − | X | ) | ÷ | 1000 | = | 921 2000 |
| Left side of the equation = | 5 102 | + | 80 447 | + | X | × | 2 255 | + | ( | 422 5 | − | X | ) | × | 1 1000 |
| = | 1155 5066 | + | 2 255 | X | + | ( | 422 5 | − | X | ) | × | 1 1000 |
1155 5066 | + | 2 255 | X | + | ( | 422 5 | − | X | ) | × | 1 1000 | = | 921 2000 |
| Left side of the equation = | 1155 5066 | + | 2 255 | X | + | 422 5 | × | 1 1000 | − | X | × | 1 1000 |
| = | 1155 5066 | + | 2 255 | X | + | 211 2500 | − | X | × | 1 1000 |
| = | 1978213 6332500 | + | 349 51000 | X |
1978213 6332500 | + | 349 51000 | X | = | 921 2000 |
349 51000 | X | = | 921 2000 | − | 1978213 6332500 |