72 5 | + | 2 | a | − | 36 25 | a | − | 1 10 | a | − | 36 25 | − | 1 5 | a | = | 1933 125 |
| Left side of the equation = | 324 25 | + | 13 50 | a |
324 25 | + | 13 50 | a | = | 1933 125 |
13 50 | a | = | 1933 125 | − | 324 25 |
13 50 | a | = | 313 125 |
| a | = | 313 125 | ÷ | 13 50 |
| = | 313 125 | × | 50 13 |
| = | 313 5 | × | 2 13 |
| a | = | 626 65 |
| a | = | 9.630769 |