| 1223 | − | 8 | ( | 8 | x | + | 140 | ) | = | 10 | ( | 5 | x | − | 33 | ) | + | 615 |
| Left side of the equation = | 1223 | − | 8 | × | 8 | x | − | 8 | × | 140 |
| = | 1223 | − | 64 | x | − | 1120 |
| = | 103 | − | 64 | x |
| 103 | − | 64 | x | = | 10 | ( | 5 | x | − | 33 | ) | + | 615 |
| Right side of the equation = | 10 | × | 5 | x | − | 10 | × | 33 | + | 615 |
| = | 50 | x | − | 330 | + | 615 |
| = | 50 | x | + | 285 |
| 103 | − | 64 | x | = | 50 | x | + | 285 |
| - | 64 | x | − | 50 | x | = | 285 | − | 103 |
| - | 114 | x | = | 285 | − | 103 |
| - | 114 | x | = | 182 |
| - | 182 | = | 114 | x |
| 114 | x | = | - | 182 |
| x | = | - | 182 | ÷ | 114 |
| = | - | 182 | × | 1 114 |
| = | - | 91 | × | 1 57 |
| x | = | - | 91 57 |
| x | = | - 1.596491 |