3 100 | a | + | 7 200 | ( | 1331078 | − | a | ) | = | 0 |
| Left side of the equation = | 3 100 | a | + | 7 200 | × | 1331078 | − | 7 200 | a |
| = | 3 100 | a | + | 4658773 100 | − | 7 200 | a |
| = | - | 1 200 | a | + | 4658773 100 |
| - | 1 200 | a | + | 4658773 100 | = | 0 |
| - | 1 200 | a | = | 0 | − | 4658773 100 |
| - | 1 200 | a | = | - | 4658773 100 |
4658773 100 | = | 1 200 | a |
1 200 | a | = | 4658773 100 |
| a | = | 4658773 100 | ÷ | 1 200 |
| = | 4658773 100 | × | 200 |
| = | 4658773 | × | 2 |
| a | = | 9317546 |