| ( | 95 | − | 5 | x | ) | ( | 6 | + | 2 | x | ) | = | 1120 |
| 方程左边 = | 95 | ( | 6 | + | 2 | x | ) | − | 5 | x | ( | 6 | + | 2 | x | ) |
| = | 95 | × | 6 | + | 95 | × | 2 | x | − | 5 | x | ( | 6 | + | 2 | x | ) |
| = | 570 | + | 190 | x | − | 5 | x | ( | 6 | + | 2 | x | ) |
| = | 570 | + | 190 | x | − | 5 | x | × | 6 | − | 5 | x | × | 2 | x |
| = | 570 | + | 190 | x | − | 30 | x | − | 10 | x | x |
| = | 570 | + | 160 | x | − | 10 | x | x |
| 570 | + | 160 | x | − | 10 | x | x | = | 1120 |