302 25 | c | = | ( | c | + | 7 2 | ) | × | 399 50 |
| Right side of the equation = | c | × | 399 50 | + | 7 2 | × | 399 50 |
| = | c | × | 399 50 | + | 2793 100 |
302 25 | c | = | 399 50 | c | + | 2793 100 |
302 25 | c | − | 399 50 | c | = | 2793 100 |
41 10 | c | = | 2793 100 |
| c | = | 2793 100 | ÷ | 41 10 |
| = | 2793 100 | × | 10 41 |
| = | 2793 10 | × | 1 41 |
| c | = | 2793 410 |
| c | = | 6.812195 |