14 25 | a | + | 10 | ( | 69 25 | − | a | ) | ÷ | 21 | = | 36 25 |
| Left side of the equation = | 14 25 | a | + | 10 21 | ( | 69 25 | − | a | ) |
14 25 | a | + | 10 21 | ( | 69 25 | − | a | ) | = | 36 25 |
| Left side of the equation = | 14 25 | a | + | 10 21 | × | 69 25 | − | 10 21 | a |
| = | 14 25 | a | + | 46 35 | − | 10 21 | a |
| = | 44 525 | a | + | 46 35 |
44 525 | a | + | 46 35 | = | 36 25 |
44 525 | a | = | 36 25 | − | 46 35 |
44 525 | a | = | 22 175 |
| a | = | 22 175 | ÷ | 44 525 |
| = | 22 175 | × | 525 44 |
| = | 1 | × | 3 2 |
| a | = | 3 2 |
| a | = | 1.5 |