| ( | 200 | + | 1000 | ) | i | − | 6 | + | 12 | = | 0 |
| Left side of the equation = | ( | 200 | + | 1000 | ) | i | + | 6 |
| ( | 200 | + | 1000 | ) | i | + | 6 | = | 0 |
| Left side of the equation = | 200 | i | + | 1000 | i | + | 6 |
| = | 1200 | i | + | 6 |
| 1200 | i | + | 6 | = | 0 |
| 1200 | i | = | 0 | − | 6 |
| 1200 | i | = | - | 6 |
| i | = | - | 6 | ÷ | 1200 |
| = | - | 6 | × | 1 1200 |
| = | - | 1 | × | 1 200 |
| i | = | - | 1 200 |
| i | = | - 0.005 |