123 1250 | X | + | 160 | + | 35 | × | 12 | = | 11 100 | X | + | 200 | + | 25 | × | 12 |
| Left side of the equation = | 123 1250 | X | + | 160 | + | 420 |
| = | 123 1250 | X | + | 580 |
123 1250 | X | + | 580 | = | 11 100 | X | + | 200 | + | 25 | × | 12 |
| Right side of the equation = | 11 100 | X | + | 200 | + | 300 |
| = | 11 100 | X | + | 500 |
123 1250 | X | + | 580 | = | 11 100 | X | + | 500 |
123 1250 | X | − | 11 100 | X | = | 500 | − | 580 |
| - | 29 2500 | X | = | 500 | − | 580 |
| - | 29 2500 | X | = | - | 80 |
| 80 | = | 29 2500 | X |
29 2500 | X | = | 80 |
| X | = | 80 | ÷ | 29 2500 |
| = | 80 | × | 2500 29 |
| X | = | 200000 29 |
| X | = | 6896.551724 |