67 1000 | ( | 20949 250 | − | y | ) | + | 57 1000 | y | = | 6123 1250 |
| Left side of the equation = | 67 1000 | × | 20949 250 | − | 67 1000 | y | + | 57 1000 | y |
| = | 1403583 250000 | − | 67 1000 | y | + | 57 1000 | y |
| = | 1403583 250000 | − | 1 100 | y |
1403583 250000 | − | 1 100 | y | = | 6123 1250 |
| - | 1 100 | y | = | 6123 1250 | − | 1403583 250000 |
| - | 1 100 | y | = | - | 178983 250000 |
178983 250000 | = | 1 100 | y |
1 100 | y | = | 178983 250000 |
| y | = | 178983 250000 | ÷ | 1 100 |
| = | 178983 250000 | × | 100 |
| = | 178983 2500 | × | 1 |
| y | = | 178983 2500 |
| y | = | 71.5932 |