| ( | X | − | 21 5000 | ) | × | 343 1000 | × | 100 | ÷ | 1 2 | = | 1 4 |
| Left side of the equation = | ( | X | − | 21 5000 | ) | × | 343 5 |
| ( | X | − | 21 5000 | ) | × | 343 5 | = | 1 4 |
| Left side of the equation = | X | × | 343 5 | − | 21 5000 | × | 343 5 |
| = | X | × | 343 5 | − | 7203 25000 |
343 5 | X | − | 7203 25000 | = | 1 4 |
343 5 | X | = | 1 4 | + | 7203 25000 |
343 5 | X | = | 13453 25000 |
| X | = | 13453 25000 | ÷ | 343 5 |
| = | 13453 25000 | × | 5 343 |
| = | 13453 5000 | × | 1 343 |
| X | = | 13453 1715000 |
| X | = | 0.007844 |