| 20 | ÷ | 102 | + | 1 | ÷ | 89 2 | + | X | ÷ | 500 | + | ( | 388 5 | − | X | ) | ÷ | 1000 | = | 157 500 |
| Left side of the equation = | 10 51 | + | 2 89 | + | X | × | 1 500 | + | ( | 388 5 | − | X | ) | × | 1 1000 |
| = | 992 4539 | + | 1 500 | X | + | ( | 388 5 | − | X | ) | × | 1 1000 |
992 4539 | + | 1 500 | X | + | ( | 388 5 | − | X | ) | × | 1 1000 | = | 157 500 |
| Left side of the equation = | 992 4539 | + | 1 500 | X | + | 388 5 | × | 1 1000 | − | X | × | 1 1000 |
| = | 992 4539 | + | 1 500 | X | + | 97 1250 | − | X | × | 1 1000 |
| = | 1680283 5673750 | + | 1 1000 | X |
1680283 5673750 | + | 1 1000 | X | = | 157 500 |
1 1000 | X | = | 157 500 | − | 1680283 5673750 |
1 1000 | X | = | 202549 11347500 |
| X | = | 202549 11347500 | ÷ | 1 1000 |
| = | 202549 11347500 | × | 1000 |
| = | 202549 22695 | × | 2 |
| X | = | 405098 22695 |
| X | = | 17.849659 |