| a | − | 1 20 | a | − | ( | a | ÷ | 53 50 | × | 3 50 | ) | = | 30000 |
| Left side of the equation = | 19 20 | a | − | ( | a | ÷ | 53 50 | × | 3 50 | ) |
19 20 | a | − | ( | a | ÷ | 53 50 | × | 3 50 | ) | = | 30000 |
| Left side of the equation = | 19 20 | a | − | a | ÷ | 53 50 | × | 3 50 |
| = | 19 20 | a | − | a | × | 3 53 |
| = | 947 1060 | a |
947 1060 | a | = | 30000 |
| a | = | 30000 | ÷ | 947 1060 |
| = | 30000 | × | 1060 947 |
| a | = | 31800000 947 |
| a | = | 33579.725449 |