607 50 | c | = | 797 100 | ( | 69 20 | + | c | ) |
| Right side of the equation = | 797 100 | × | 69 20 | + | 797 100 | c |
| = | 54993 2000 | + | 797 100 | c |
607 50 | c | = | 54993 2000 | + | 797 100 | c |
607 50 | c | − | 797 100 | c | = | 54993 2000 |
417 100 | c | = | 54993 2000 |
| c | = | 54993 2000 | ÷ | 417 100 |
| = | 54993 2000 | × | 100 417 |
| = | 18331 20 | × | 1 139 |
| c | = | 18331 2780 |
| c | = | 6.593885 |