| 10 | = | 8 | ( | 1 | − | x | ) | ÷ | ( | 70 | − | 15 | ) | − | 8 | ( | 1 | − | x | ) |
| 方程两边同时乘以: | ( | 70 | − | 15 | ) |
| 10 | ( | 70 | − | 15 | ) | = | 8 | ( | 1 | − | x | ) | − | 8 | ( | 1 | − | x | ) | ( | 70 | − | 15 | ) |
| 10 | × | 70 | − | 10 | × | 15 | = | 8 | ( | 1 | − | x | ) | − | 8 | ( | 1 | − | x | ) | ( | 70 | − | 15 | ) |
| 10 | × | 70 | − | 10 | × | 15 | = | 8 | × | 1 | − | 8 | x | − | 8 | ( | 1 | − | x | ) | ( | 70 | − | 15 | ) |
| 700 | − | 150 | = | 8 | − | 8 | x | − | 8 | ( | 1 | − | x | ) | ( | 70 | − | 15 | ) |
| 550 | = | 8 | − | 8 | x | − | 8 | ( | 1 | − | x | ) | ( | 70 | − | 15 | ) |
| 550 | = | 8 | − | 8 | x | − | 8 | × | 1 | ( | 70 | − | 15 | ) | + | 8 | x | ( | 70 | − | 15 | ) |
| 550 | = | 8 | − | 8 | x | − | 8 | ( | 70 | − | 15 | ) | + | 8 | x | ( | 70 | − | 15 | ) |
| 550 | = | 8 | − | 8 | x | − | 8 | × | 70 | + | 8 | × | 15 | + | 8 | x | ( | 70 | − | 15 | ) |
| 550 | = | 8 | − | 8 | x | − | 560 | + | 120 | + | 8 | x | ( | 70 | − | 15 | ) |
| 550 | = | - | 432 | − | 8 | x | + | 8 | x | ( | 70 | − | 15 | ) |
| 550 | = | - | 432 | − | 8 | x | + | 8 | x | × | 70 | − | 8 | x | × | 15 |
| 550 | = | - | 432 | − | 8 | x | + | 560 | x | − | 120 | x |
| 550 | = | - | 432 | + | 432 | x |
| - | 432 | x | = | - | 432 | − | 550 |
| - | 432 | x | = | - | 982 |
| 982 | = | 432 | x |
| 432 | x | = | 982 |
| x | = | 982 | ÷ | 432 |
| = | 982 | × | 1 432 |
| = | 491 | × | 1 216 |
| x | = | 491 216 |
| x | = | 2.273148 |