1217 100 | c | = | ( | 7 2 | + | c | ) | × | 399 50 |
| Right side of the equation = | 7 2 | × | 399 50 | + | c | × | 399 50 |
| = | 2793 100 | + | c | × | 399 50 |
1217 100 | c | = | 2793 100 | + | 399 50 | c |
1217 100 | c | − | 399 50 | c | = | 2793 100 |
419 100 | c | = | 2793 100 |
| c | = | 2793 100 | ÷ | 419 100 |
| = | 2793 100 | × | 100 419 |
| = | 2793 | × | 1 419 |
| c | = | 2793 419 |
| c | = | 6.665871 |