| ( | 8450 | + | X | ) | × | 13 400 | = | 4 | X |
| Left side of the equation = | 8450 | × | 13 400 | + | X | × | 13 400 |
| = | 2197 8 | + | X | × | 13 400 |
2197 8 | + | 13 400 | X | = | 4 | X |
13 400 | X | − | 4 | X | = | - | 2197 8 |
| - | 1587 400 | X | = | - | 2197 8 |
2197 8 | = | 1587 400 | X |
1587 400 | X | = | 2197 8 |
| X | = | 2197 8 | ÷ | 1587 400 |
| = | 2197 8 | × | 400 1587 |
| = | 2197 | × | 50 1587 |
| X | = | 109850 1587 |
| X | = | 69.218652 |