| 4100 | + | x | + | ( | ( | 4100 | + | x | ) | ÷ | 87 4 | × | 8 | ) | = | 5200 |
| Left side of the equation = | 4100 | + | x | + | ( | 4100 | + | x | ) | ÷ | 87 4 | × | 8 |
| = | 4100 | + | x | + | ( | 4100 | + | x | ) | × | 32 87 |
| = | 4100 | + | x | + | 4100 | × | 32 87 | + | x | × | 32 87 |
| = | 4100 | + | x | + | 131200 87 | + | x | × | 32 87 |
| = | 487900 87 | + | 119 87 | x |
487900 87 | + | 119 87 | x | = | 5200 |
119 87 | x | = | 5200 | − | 487900 87 |
119 87 | x | = | - | 35500 87 |
| x | = | - | 35500 87 | ÷ | 119 87 |
| = | - | 35500 87 | × | 87 119 |
| = | - | 35500 | × | 1 119 |
| x | = | - | 35500 119 |
| x | = | - 298.319328 |