| ( | 342 25 | + | x | ) | × | 67 10 | = | 70 |
| 方程左边 = | 342 25 | × | 67 10 | + | x | × | 67 10 |
| = | 11457 125 | + | x | × | 67 10 |
11457 125 | + | 67 10 | x | = | 70 |
67 10 | x | = | 70 | − | 11457 125 |
67 10 | x | = | - | 2707 125 |
| x | = | - | 2707 125 | ÷ | 67 10 |
| = | - | 2707 125 | × | 10 67 |
| = | - | 2707 25 | × | 2 67 |
| x | = | - | 5414 1675 |
| x | = | - 3.232239 |