| c | ( | 1 5 | + | c | ) | ÷ | ( | 1 | − | c | ) | = | 9 5 | × | 1 100000 |
| 方程两边同时乘以: | ( | 1 | − | c | ) |
| c | ( | 1 5 | + | c | ) | = | 9 5 | × | 1 100000 | ( | 1 | − | c | ) |
| c | × | 1 5 | + | c | c | = | 9 5 | × | 1 100000 | ( | 1 | − | c | ) |
| c | × | 1 5 | + | c | c | = | 9 5 | × | 1 100000 | × | 1 | − | 9 5 | × | 1 100000 | c |
| c | × | 1 5 | + | c | c | = | 9 500000 | − | 9 500000 | c |
| c1=0 | ,它是方程的增解。 |