| 200 | + | 200 | ( | 1 | + | x | ) | + | 200 | ( | 1 | + | x | ) | ( | 1 | + | x | ) | = | 0 |
| Left side of the equation = | 200 | + | 200 | × | 1 | + | 200 | x | + | 200 | ( | 1 | + | x | ) | ( | 1 | + | x | ) |
| = | 200 | + | 200 | + | 200 | x | + | 200 | ( | 1 | + | x | ) | ( | 1 | + | x | ) |
| = | 400 | + | 200 | x | + | 200 | ( | 1 | + | x | ) | ( | 1 | + | x | ) |
| = | 400 | + | 200 | x | + | 200 | × | 1 | ( | 1 | + | x | ) | + | 200 | x | ( | 1 | + | x | ) |
| = | 400 | + | 200 | x | + | 200 | ( | 1 | + | x | ) | + | 200 | x | ( | 1 | + | x | ) |
| = | 400 | + | 200 | x | + | 200 | × | 1 | + | 200 | x | + | 200 | x | ( | 1 | + | x | ) |
| = | 400 | + | 200 | x | + | 200 | + | 200 | x | + | 200 | x | ( | 1 | + | x | ) |
| = | 600 | + | 400 | x | + | 200 | x | ( | 1 | + | x | ) |
| = | 600 | + | 400 | x | + | 200 | x | × | 1 | + | 200 | x | x |
| = | 600 | + | 400 | x | + | 200 | x | + | 200 | x | x |
| = | 600 | + | 600 | x | + | 200 | x | x |
| 600 | + | 600 | x | + | 200 | x | x | = | 0 |