| - | ( | 6850 | ÷ | T | ) | − | 7551 10000 | T | + | 281 25 | = | - | ( | 6620 | ÷ | T | ) | − | 12551 10000 | T | + | 617 50 |
| - | 6850 | ÷ | T | − | 7551 10000 | T | + | 281 25 | = | - | ( | 6620 | ÷ | T | ) | − | 12551 10000 | T | + | 617 50 |
| - | 6850 | ÷ | T | − | 7551 10000 | T | + | 281 25 | = | - | 6620 | ÷ | T | − | 12551 10000 | T | + | 617 50 |
| Multiply both sides of the equation by: | T |
| - | 6850 | − | 7551 10000 | T | T | + | 281 25 | T | = | - | 6620 | ÷ | 1 | × | 1 | − | 12551 10000 | T | T | + | 617 50 | T |