| ( | 1800 | × | 12 | × | 9 10 | − | 7 10 | × | 67 | X | × | 13 200 | ) | ÷ | ( | 3 10 | × | 67 | X | + | 1 20 | × | 67 | X | ) | = | 19 500 |
| Multiply both sides of the equation by: | ( | 3 10 | × | 67 | X | + | 1 20 | × | 67 | X | ) |
| ( | 1800 | × | 12 | × | 9 10 | − | 7 10 | × | 67 | X | × | 13 200 | ) | = | 19 500 | ( | 3 10 | × | 67 | X | + | 1 20 | × | 67 | X | ) |
| 1800 | × | 12 | × | 9 10 | − | 7 10 | × | 67 | X | × | 13 200 | = | 19 500 | ( | 3 10 | × | 67 | X | + | 1 20 | × | 67 | X | ) |
| 1800 | × | 12 | × | 9 10 | − | 7 10 | × | 67 | X | × | 13 200 | = | 19 500 | × | 3 10 | × | 67 | X | + | 19 500 | × | 1 20 | × | 67 | X |
| 19440 | − | 6097 2000 | X | = | 3819 5000 | X | + | 1273 10000 | X |
| 19440 | − | 6097 2000 | X | = | 8911 10000 | X |
| - | 6097 2000 | X | − | 8911 10000 | X | = | - | 19440 |
| - | 9849 2500 | X | = | - | 19440 |
| 19440 | = | 9849 2500 | X |
9849 2500 | X | = | 19440 |
| X | = | 19440 | ÷ | 9849 2500 |
| = | 19440 | × | 2500 9849 |
| = | 6480 | × | 2500 3283 |
| X | = | 16200000 3283 |
| X | = | 4934.511118 |