263 20 | c | = | ( | 33 10 | + | c | ) | × | 159 20 |
| 方程右边 = | 33 10 | × | 159 20 | + | c | × | 159 20 |
| = | 5247 200 | + | c | × | 159 20 |
263 20 | c | = | 5247 200 | + | 159 20 | c |
263 20 | c | − | 159 20 | c | = | 5247 200 |
26 5 | c | = | 5247 200 |
| c | = | 5247 200 | ÷ | 26 5 |
| = | 5247 200 | × | 5 26 |
| = | 5247 40 | × | 1 26 |
| c | = | 5247 1040 |
| c | = | 5.045192 |