| X | × | 49 100 | = | X | ( | 20 100 | + | 8 100 | ) | + | 121340 |
| Right side of the equation = | X | × | 20 100 | + | X | × | 8 100 | + | 121340 |
| = | 7 25 | X | + | 121340 |
49 100 | X | = | 7 25 | X | + | 121340 |
49 100 | X | − | 7 25 | X | = | 121340 |
21 100 | X | = | 121340 |
| X | = | 121340 | ÷ | 21 100 |
| = | 121340 | × | 100 21 |
| X | = | 12134000 21 |
| X | = | 577809.52381 |