4 5 | ( | 10 | + | 12 5 | x | + | 4 5 | ( | x | − | 10 | ) | + | 2 5 | x | ÷ | 40 | × | 60 | ) | − | ( | 14 | + | 7 | × | 11 5 | + | x | − | 10 | ) | = | 9 5 |
| 方程左边 = | 4 5 | × | 10 | + | 4 5 | × | 12 5 | x | + | 4 5 | × | 4 5 | ( | x | − | 10 | ) | + | 4 5 | × | 2 5 | x | ÷ | 40 |
| = | 8 | + | 48 25 | x | + | 16 25 | ( | x | − | 10 | ) | + | 12 25 | x | − | ( | 14 | + | 7 | × | 11 5 | + | x | − | 10 | ) |
| = | 8 | + | 12 5 | x | + | 16 25 | ( | x | − | 10 | ) | − | ( | 14 | + | 7 | × | 11 5 | + | x | − | 10 | ) |
| = | 8 | + | 12 5 | x | + | 16 25 | x | − | 16 25 | × | 10 | − | ( | 14 | + | 7 | × | 11 5 | + | x | − | 10 | ) |
| = | 8 | + | 12 5 | x | + | 16 25 | x | − | 32 5 | − | ( | 14 | + | 7 | × | 11 5 | + | x | − | 10 | ) |
| = | 8 5 | + | 76 25 | x | − | ( | 14 | + | 7 | × | 11 5 | + | x | − | 10 | ) |
| = | 8 5 | + | 76 25 | x | − | 14 | − | 7 | × | 11 5 | − | x | + | 10 |
| = | 8 5 | + | 76 25 | x | − | 14 | − | 77 5 | − | x | + | 10 |
| = | - | 89 5 | + | 51 25 | x |
| - | 89 5 | + | 51 25 | x | = | 9 5 |
51 25 | x | = | 9 5 | + | 89 5 |
51 25 | x | = | 98 5 |
| x | = | 98 5 | ÷ | 51 25 |
| = | 98 5 | × | 25 51 |
| = | 98 | × | 5 51 |
| x | = | 490 51 |
| x | = | 9.607843 |