| I | × | 1 | + | I | × | 2 | = | I | × | 3 |
| Left side of the equation = | 3 | I |
| 3 | I | = | I | × | 3 |
| 3 | I | − | 3 | I | = | 0 |
| 0 | I | = | 0 |
| 510 | I | × | 1 | + | 510 | I | × | 2 | + | 510 | I | × | 3 | = | 12 |
| Left side of the equation = | 510 | I | + | 1020 | I | + | 1530 | I |
| = | 3060 | I |
| 3060 | I | = | 12 |
| I | = | 12 | ÷ | 3060 |
| = | 12 | × | 1 3060 |
| = | 1 | × | 1 255 |
| I | = | 1 255 |
| I | = | 0.003922 |