| x | ( | 51 100 | + | x | ) | ÷ | ( | 51 100 | − | x | ) | = | 107 2000000 |
| Multiply both sides of the equation by: | ( | 51 100 | − | x | ) |
| x | ( | 51 100 | + | x | ) | = | 107 2000000 | ( | 51 100 | − | x | ) |
| x | × | 51 100 | + | x | x | = | 107 2000000 | ( | 51 100 | − | x | ) |
| x | × | 51 100 | + | x | x | = | 107 2000000 | × | 51 100 | − | 107 2000000 | x |
| x | × | 51 100 | + | x | x | = | 5457 200000000 | − | 107 2000000 | x |
| x1=0 | , it is the incremental root of the eqution. |