| 200 | X | + | ( | 110 | × | 13 20 | − | X | ) | × | 130 | + | 65 | × | 110 | + | 110 | × | 1 4 | × | 75 | = | 22696 |
| Left side of the equation = | 200 | X | + | ( | 110 | × | 13 20 | − | X | ) | × | 130 | + | 7150 | + | 4125 2 |
| = | 200 | X | + | ( | 110 | × | 13 20 | − | X | ) | × | 130 | + | 18425 2 |
| 200 | X | + | ( | 110 | × | 13 20 | − | X | ) | × | 130 | + | 18425 2 | = | 22696 |
| Left side of the equation = | 200 | X | + | 110 | × | 13 20 | × | 130 | − | X | × | 130 | + | 18425 2 |
| = | 200 | X | + | 9295 | − | X | × | 130 | + | 18425 2 |
| = | 70 | X | + | 37015 2 |
| 70 | X | + | 37015 2 | = | 22696 |
| 70 | X | = | 22696 | − | 37015 2 |
| 70 | X | = | 8377 2 |
| X | = | 8377 2 | ÷ | 70 |
| = | 8377 2 | × | 1 70 |
| X | = | 8377 140 |
| X | = | 59.835714 |