| ( | x | + | 800 | − | 1261893 100 | ) | ( | 1 | − | 25 100 | ) | ÷ | ( | 100000 | × | 3 10 | × | 9 10 | ) | = | 5 100 |
| 方程两边同时乘以: | ( | 100000 | × | 3 10 | × | 9 10 | ) |
| ( | x | + | 800 | − | 1261893 100 | ) | ( | 1 | − | 25 100 | ) | = | 5 100 | ( | 100000 | × | 3 10 | × | 9 10 | ) |
| x | ( | 1 | − | 25 100 | ) | + | 800 | ( | 1 | − | 25 100 | ) | − | 1261893 100 | ( | 1 | − | 25 100 | ) | = | 5 100 | ( | 100000 | × | 3 10 | × | 9 10 | ) |
| x | ( | 1 | − | 25 100 | ) | + | 800 | ( | 1 | − | 25 100 | ) | − | 1261893 100 | ( | 1 | − | 25 100 | ) | = | 5 100 | × | 100000 | × | 3 10 | × | 9 10 |
| x | ( | 1 | − | 25 100 | ) | + | 800 | ( | 1 | − | 25 100 | ) | − | 1261893 100 | ( | 1 | − | 25 100 | ) | = | 1350 |
| x | × | 1 | − | x | × | 25 100 | + | 800 | ( | 1 | − | 25 100 | ) | − | 1261893 100 | ( | 1 | − | 25 100 | ) | = | 1350 |
3 4 | x | + | 800 | ( | 1 | − | 25 100 | ) | − | 1261893 100 | ( | 1 | − | 25 100 | ) | = | 1350 |
3 4 | x | + | 800 | × | 1 | − | 800 | × | 25 100 | − | 1261893 100 | ( | 1 | − | 25 100 | ) | = | 1350 |
3 4 | x | + | 800 | − | 200 | − | 1261893 100 | ( | 1 | − | 25 100 | ) | = | 1350 |
3 4 | x | + | 600 | − | 1261893 100 | ( | 1 | − | 25 100 | ) | = | 1350 |
3 4 | x | + | 600 | − | 1261893 100 | × | 1 | + | 1261893 100 | × | 25 100 | = | 1350 |
3 4 | x | + | 600 | − | 1261893 100 | + | 1261893 400 | = | 1350 |
3 4 | x | − | 3545679 400 | = | 1350 |
3 4 | x | = | 1350 | + | 3545679 400 |
3 4 | x | = | 4085679 400 |
| x | = | 4085679 400 | ÷ | 3 4 |
| = | 4085679 400 | × | 4 3 |
| = | 1361893 100 | × | 1 |
| x | = | 1361893 100 |
| x | = | 13618.93 |