| ( | 900 | − | 560 | − | 120 | ) | Q | − | 120000000 | = | 0 |
| Left side of the equation = | 900 | Q | − | 560 | Q | − | 120 | Q | − | 120000000 |
| = | 220 | Q | − | 120000000 |
| 220 | Q | − | 120000000 | = | 0 |
| 220 | Q | = | 0 | + | 120000000 |
| 220 | Q | = | 120000000 |
| Q | = | 120000000 | ÷ | 220 |
| = | 120000000 | × | 1 220 |
| = | 6000000 | × | 1 11 |
| Q | = | 6000000 11 |
| Q | = | 545454.545455 |