331 25 | c | = | ( | 7 2 | + | c | ) | × | 399 50 |
方程右边 = | 7 2 | × | 399 50 | + | c | × | 399 50 |
= | 2793 100 | + | c | × | 399 50 |
331 25 | c | = | 2793 100 | + | 399 50 | c |
331 25 | c | − | 399 50 | c | = | 2793 100 |
263 50 | c | = | 2793 100 |
c | = | 2793 100 | ÷ | 263 50 |
= | 2793 100 | × | 50 263 |
= | 2793 2 | × | 1 263 |
c | = | 2793 526 |
c | = | 5.309886 |