1209 100 | c | = | ( | 33 10 | + | c | ) | × | 897 100 |
| 方程右边 = | 33 10 | × | 897 100 | + | c | × | 897 100 |
| = | 29601 1000 | + | c | × | 897 100 |
1209 100 | c | = | 29601 1000 | + | 897 100 | c |
1209 100 | c | − | 897 100 | c | = | 29601 1000 |
78 25 | c | = | 29601 1000 |
| c | = | 29601 1000 | ÷ | 78 25 |
| = | 29601 1000 | × | 25 78 |
| = | 759 40 | × | 1 2 |
| c | = | 759 80 |
| c | = | 9.4875 |