| 18 | ÷ | 6679 50 | + | X | ÷ | 1000 | + | ( | 76 | − | X | ) | ÷ | 1650 | = | 1 5 |
| Left side of the equation = | 900 6679 | + | X | × | 1 1000 | + | ( | 76 | − | X | ) | × | 1 1650 |
900 6679 | + | 1 1000 | X | + | ( | 76 | − | X | ) | × | 1 1650 | = | 1 5 |
| Left side of the equation = | 900 6679 | + | 1 1000 | X | + | 76 | × | 1 1650 | − | X | × | 1 1650 |
| = | 900 6679 | + | 1 1000 | X | + | 38 825 | − | X | × | 1 1650 |
| = | 996302 5510175 | + | 13 33000 | X |
996302 5510175 | + | 13 33000 | X | = | 1 5 |
13 33000 | X | = | 1 5 | − | 996302 5510175 |
13 33000 | X | = | 105733 5510175 |
| X | = | 105733 5510175 | ÷ | 13 33000 |
| = | 105733 5510175 | × | 33000 13 |
| = | 105733 6679 | × | 40 13 |
| X | = | 4229320 86827 |
| X | = | 48.709733 |